Changes In Relative Humidity Research Articles

Influence of Weather Factors on Incidence and Infestation of Shoot and Fruit Borer in Brinjal

Aims: To correlate the influence of weather variables on population dynamics, incidence and infestation of Brinjal shoot and fruit Borer (BFSB) in Brinjal.
 Place and Duration of Study: The study was carried out at Regional Research and Technology Transfer Station (RRTTS) at Ranital, Bhadrak Odisha and at Instructional Farm at OUAT, Bhubaneswar, Odisha for period of 1 year.
 Methodology: The population of Brinjal shoot and fruit Borer were recorded from transplanting to harvest of the crop. Five random plants were selected and tagged for observation recording, except boarder plants. To determine the percentage of affected shoots, brinjal plants showing signs of delicate shoots drooping, withering, and drying were counted. Similarly, the population was correlated with weather conditions and the number of fruits showing signs of bore holes on fruits was tallied to estimate the percent fruit infection.
 Results: The investigation indicates that quantitatively establish the relationship of weather parameters as varied with the dates of sowing (23 May,20 November2021, 21 January2022) and Brinjal fruit and shoot borer (BFSB).The studies revealed that the peak population of brinjal shoot and fruit borer was observed during 34th SMW (22-28 August), 5th SMW(30 January- 5 February) and 18th SMW(1-7May) with shoot infestation(38.44%), (11.10%) and (57.99%) respectively. The fruit was infested with a peak of 47.55%, 27.07% and 63.84% on 39th SMW (26 September- 2 October), 9th SMW (27February-5March) and 18th SMW (1-8May) respectively. The BSFB shows positive significant correlation with relative humidity.
 Conclusion: The population of BSFB fluctuates with change in temperature, rainfall, and relative humidity. On first sowing date BSFB population has a less population dynamics comparatively to other two sowing dates. So it is concluded for early sowing results in less pest population.

Surface warming and wetting due to methane’s long-wave radiative effects muted by short-wave absorption

Although greenhouse gases absorb primarily long-wave radiation, they also absorb short-wave radiation. Recent studies have highlighted the importance of methane short-wave absorption, which enhances its stratospherically adjusted radiative forcing by up to ~ 15%. The corresponding climate impacts, however, have been only indirectly evaluated and thus remain largely unquantified. Here we present a systematic, unambiguous analysis using one model and separate simulations with and without methane short-wave absorption. We find that methane short-wave absorption counteracts ~30% of the surface warming associated with its long-wave radiative effects. An even larger impact occurs for precipitation as methane short-wave absorption offsets ~60% of the precipitation increase relative to its long-wave radiative effects. The methane short-wave-induced cooling is due largely to cloud rapid adjustments, including increased low-level clouds, which enhance the reflection of incoming short-wave radiation, and decreased high-level clouds, which enhance outgoing long-wave radiation. The cloud responses, in turn, are related to the profile of atmospheric solar heating and corresponding changes in temperature and relative humidity. Despite our findings, methane remains a potent contributor to global warming, and efforts to reduce methane emissions are vital for keeping global warming well below 2 °C above preindustrial values.

Dual-parameter optical fiber sensor for temperature and humidity based on PMMA-microsphere and FBG composite structure

In this work, we proposed and experimentally demonstrated an optical fiber temperature and humidity sensor composed of a polymethyl methacrylate (PMMA)-microsphere and a fiber Bragg grating (FBG), and realize monitoring the environment temperature and humidity simultaneously. The experimental results show that when the relative humidity (RH) change from 35% to 85%, the response sensitivity of the Fabry-Pérot (F-P), which is formed between PMMA-microsphere and the fiber end-face, is about 127 pm/%RH. However, the FBG in the structure is not sensitive to humidity. When temperature changes from 33 °C to 58 °C, the response sensitivity of the F-P and FBG are about 45.68 pm/°C and 10 pm/°C, respectively. When temperature and humidity change simultaneously, these two-parameters can be monitored simultaneously by using the dual-parameter measurement matrix method. The optical fiber dual-parameter sensor offers numerous advantages, such as low cost, high sensitivity, and easy fabrication.

Adiabatic Cooling System Working Process Investigation

Avoiding heat stress in cows is an important condition for animal productivity and the maintaining of animal health. For this, it is necessary to provide an optimal microclimate in cowsheds using systems of air cooling. The paper analyzes one of these systems—an air humidification–cooling system. The research was carried out in a semi-insulated box-type cowshed containing 244 places. The changes in temperature, relative humidity, and temperature humidity index (THI) were studied for the air coming from outside and for the air inside the cowshed. Considering the fact that the cows were in the cowshed most of the time (51.5%) under heat stress, the use of a cooling system is appropriate. It was established that a cooling system is capable of compensating for heat released by animals. It was determined that with an increase in air temperature the relative efficiency of a cooling system increases. An intensive constant air exchange provided using fan operation avoids an excessive growth of relative humidity in a cowshed. To reduce the consumption of electricity and water, the paper suggests regulation of both the power of the fans of the system and the water supply to the nozzles not using temperature but using THI. Theoretically, when THI is used to regulate the operation of the cooling system, the consumption of electrical energy is reduced by 17.8%, and the consumption of water is reduced by 43.2% when compared to the option when the temperature is used to regulate the operation of a cooling system.

Evolution of adhesion force behavior at the silica-HOPG interface from humidity-independent to humidity-dependent revealed on an AFM

ABSTRACT The influence of relative humidity (RH) on adhesion force requires clarification. Adhesion forces between atomic force microscopy (AFM) silica cantilevers and highly oriented pyrolytic graphite (HOPG) were measured to study the influence. The force behavior can evolve from RH-independent to RH-dependent with repeated contacts. Initially, the force is relatively small and RH-independent without a large water bridge. However, it becomes RH-dependent after some time at a high RH and never changes again. The RH-dependent force generally exhibits a stable-increasing-stable behavior with RH due to thin-film flow. With a continually increasing-stable-decreasing RH, the RH-dependent force can usually keep pace with RH, indicating that the adsorption and desorption of water molecules are sensitive to RH. However, the force behavior can show a certain lag and advance (including a sudden change). The reasons were manifold: (1) the water bridge can suddenly form and disappear, (2) the equilibrium time for a film-vapor interface is long at high RHs, and (3) the Laplace pressure can change with a constant volume. The RH-dependent force usually keeps pace with a suddenly changed RH, indicating the fast growth process of a water bridge at a high desired RH. The results may enhance the understanding of adhesion mechanisms.

Single-Collision Statistics Reveal a Global Mechanism Driven by Sample History for Contact Electrification in Granular Media.

Models for same-material contact electrification in granular media often rely on a local charge-driving parameter whose spatial variations lead to a stochastic origin for charge exchange. Measuring the charge transfer from individual granular spheres after contacts with substrates of the same material, we find instead a "global" charging behavior, coherent over the sample's whole surface. Cleaning and baking samples fully resets charging magnitude and direction, which indicates the underlying global parameter is not intrinsic to the material, but acquired from its history. Charging behavior is randomly and irreversibly affected by changes in relative humidity, hinting at a mechanism where adsorbates, in particular, water, are fundamental to the charge-transfer process.

Systematic Investigation on the Mechanisms for Water Responsive Actuation Using Commercial Sewing Threads

ABSTRACT Water-responsive materials alter their volumes in response to relative humidity changes. Recent progress in water-responsive materials demonstrates that this novel category of materials can perform better than natural muscles and conventional actuators by utilizing sustainable and renewable water energy. Textile fibers make excellent candidates for viable water-responsive actuators due to their scalability. However, the lack of a fundamental understanding of water responsiveness impedes their real-world applications. In this research, we selected seven different types of commercially available sewing threads: natural cellulose (cotton, flax). natural protein (wool, silk). regenerated cellulose (rayon), and synthetic (nylon, polyester) to systematically investigate their water-responsive behavior. All the sewing threads, without any chemical nor physical modification, except for polyester, repeatedly lifted a weight in response to humidity changes and generated higher specific energy density (15–210 J/kg) than mammalian muscles (8 J/kg). While the maximum water sorption by a sewing thread does not directly correlate to its mechanical actuation, the disruption of intermolecular hydrogen bonding between polymer chains by sorbed water seems critical for WR tensile actuation. In addition, the twisting of fibers to the right degree could direct the WR actuation in the desired direction. Our research with common threads sheds light on the water-responsive mechanisms and provides design guidelines for a large-scale water-responsive actuator applicable in various engineering systems, including energy harvesting, soft robotics, and protective gears that can help expand the applicability of natural fibers.

Evaporation dominates the loss of plateau lake in Southwest China using water isotope balance assessment

The water balance budget in remote plateau lakes provides a fundamental information on the local climate-hydrological pattern. However, integrated investigation on the waters entering the lake, especially groundwater, was limited. To assess the current climate stress on Yunnan-Guizhou Plateau lakes, we collected rivers, groundwater, lake, and precipitation with varying isotopic compositions in the Chenghai Lake basin over four separate campaigns during a hydrological year. The wide and enriched variation of isotope composition in rivers, groundwater, and lake indicate that they have undergone distinct evaporations, which further reveal the recharging and mixing processes. Based on the similar isotopic signals between rivers and precipitation, rivers can serve as proxies for precipitation. Groundwater was primarily replenished by high mountain precipitation duo to the stable isotopic values in aquifers. Even through mass water in lake was able to smooth out some variability, the considerable isotopic variation of lake during the four collections suggested the influence of meteorological conditions. According to the assessment of isotope balance model, lake evaporation accounts for almost 65 % of the total inflow for one year, which partially explains the climate stress on the lake level. As the most sensitive variables, changes in relative humidity (h) and isotope composition of atmospheric moisture (δA) resulted in remarkable variations in E/I ratios and the constructed water isotope framework. These results shed light on the capacity of evaporation relative to lake input and provide interpretations on local paleoclimate and predicted-climate construction.

Quantitative temperature and relative humidity changes recorded by the Lake Cuoqia in the southeastern Tibetan Plateau during the past 300 years

High-elevation lakes on the Tibetan Plateau have the advantage of sensitive response to climate changes. Multiple proxy records in lake sediments can provide a large amount of extractable information for paleoclimate reconstructions and assessing the position of recent global warming within the context of natural climate variability. In this study, we reconstruct the climatic and environmental changes over the past 300 years from a remote alpine lake (Lake Cuoqia) in the southeastern Tibetan Plateau using multiple proxies including branched glycerol dialkyl glycerol tetraethers (brGDGTs), n-alkanes, elements, fatty acids and their hydrogen isotopes. Due to ice-cover nature of lake surface during winter, brGDGTs mainly reflect the variation in warm-season temperature from March to October, supported by nearby instrumental data. Our reconstructed high-resolution temperature showed a continuous cooling trend between 1700 and 1950 AD, followed by a rapid warming afterward, in parallel with other proxies such as n-alkanes and fatty acids in the same core, which is also consistent with previously published regional temperature records. The hydrogen isotope (δD) of fatty acids, similar to regional tree-ring δ18O, can record the history of atmospheric precipitation isotope and further indicate the variations of regional relative humidity. Our record exhibited a long-term decrease since 1700 AD, in accord with the decreasing lake level inferred from the ratio of Fe/Mn. The combined pattern of reconstructed temperature and relative humidity showed consistent changes before 1950 AD toward to a gradually cold-dry trend, whereas started to decouple afterward. Before 1950 AD, the declined temperature and relative humidity are mainly driven by insolation and thermal contrast between the Indian-Pacific Ocean and south Asian continent. After 1950 AD, decoupling of temperature and relative humidity may be related to the increased regional evaporation and human-induced emission of greenhouse gases and aerosol.

Experimental Study of Frost Crystals Dendrite Growth on Two Neighboring Separate Frozen Water Drops on a Cryogenic Cold Surface under Natural Convection Conditions

The effects of cold surface temperature, wet air state (temperature and humidity) and original drop size on frost dendrites growth of two neighboring separate frozen water drops of same size under natural convection conditions were investigated by quantitative measurement. It was determined that for different cold plate surface temperature conditions, i.e., the ordinary-low temperature and the cryogenic temperature range, the frost formation mechanism is different. Under the conditions that the air temperature is not too high and absolute humidity is not too excessive, the influence of frozen water drop size on the longest dendrite of frost crystals becomes more and more obvious with the decrease in cold plate temperature. The changes in air temperature and relative humidity both change air absolute humidity, so they have similar effects on the growth of dendrites. However, the effect of wet air state on the growth of frost dendrites is not monotonous, which needs to be considered comprehensively in combination with heat and mass transfer and the existence of heavy phase layer. The thickness of ‘the initial continuous frost layer’ was measured and it was disclosed that the initial frost layer thickness is 1.7–3.0 times that of the height of the frozen water drop diameter. This value may be possibly used as initial frost layer thickness in heat and mass transfer-based frost layer growth prediction models, at least for ordinary-low temperature conditions.

KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed

Developing highly efficient semiconductor metal oxide (SMOX) sensors capable of accurate and fast responses to environmental humidity is still a challenging task. In addition to a not so pronounced sensitivity to relative humidity change, most of the SMOXs cannot meet the criteria of real-time humidity sensing due to their long response/recovery time. The way to tackle this problem is to control adsorption/desorption processes, i.e., water-vapor molecular dynamics, over the sensor's active layer through the powder and pore morphology design. With this in mind, a KIT-5-mediated synthesis was used to achieve mesoporous tin (IV) oxide replica (SnO2-R) with controlled pore size and ordering through template inversion and compared with a sol-gel synthesized powder (SnO2-SG). Unlike SnO2-SG, SnO2-R possessed a high specific surface area and quite an open pore structure, similar to the KIT-5, as observed by TEM, BET and SWAXS analyses. According to TEM, SnO2-R consisted of fine-grained globular particles and some percent of exaggerated, grown twinned crystals. The distinctive morphology of the SnO2-R-based sensor, with its specific pore structure and an increased number of oxygen-related defects associated with the powder preparation process and detected at the sensor surface by XPS analysis, contributed to excellent humidity sensing performances at room temperature, comprised of a low hysteresis error (3.7%), sensitivity of 406.8 kΩ/RH% and swift response/recovery speed (4 s/6 s).

Effect of dipping number of polyvinyl alcohol (PVA) -coated on optical Fiber for Humidity Sensor

Optical Fiber Humidity Sensors (OFHSs) have attracted significant research interest due to their several advantages including small size, high durability and can withstand the extreme environment regardless of high temperature, high pressure and high electromagnetic radiation. In this study, the proposed sensors were built from standard single-mode silica fibers working at telecommunication wavelengths and exhibited very good humidity sensing characteristics. Single-mode optical fibers were coated with different dipping numbers (2, 4, 6 8, and 10 times) of polyvinyl alcohol (PVA) solution using a dip coating method. The sensing performance of uncoated and PVA-coated optical fiber sensors in terms of its sensitivity for various relative humidity (RH) percentages ranging from 40 to 90 % RH was monitored using Ocean Optics spectrometer. The intensity peaks of PVA-coated optical fibers were increased linearly with dipping numbers. The optimum sensing performance was observed for 10 times dipping number of PVA solution with the highest intensity of 4100 counts at 60 % RH and exhibits good repeatability with precision error values in the range of 0 to 2 %. Furthermore, the gap difference between intensity counts due to % RH changes could be clearly observed for 10 times dipping numbers. These reported results are important to enhance the performance of humidity sensor for sensing and monitoring purposes.

Embedded Magnetic Sensing for Feedback Control of Soft HASEL Actuators

The need to create more viable soft sensors is increasing in tandem with the growing interest in soft robots. Several sensing methods, like capacitive stretch sensing and intrinsic capacitive self-sensing, have proven to be useful when controlling soft electro-hydraulic actuators, but are still problematic. This is due to challenges around high-voltage electronic interference or the inability to accurately sense the actuator at higher actuation frequencies. These issues are compounded when trying to sense and control the movement of a multiactuator system. To address these shortcomings, we describe a two-part magnetic sensing mechanism to measure the changes in displacement of an electro-hydraulic (HASEL) actuator. Our magnetic sensing mechanism can achieve high accuracy and precision for the HASEL actuator displacement range, and accurately tracks motion at actuation frequencies up to 30 Hz, while being robust to changes in ambient temperature and relative humidity. The high accuracy of the magnetic sensing mechanism is also further emphasized in the gripper demonstration. Using this sensing mechanism, we can detect submillimeter difference in the diameters of three tomatoes. Finally, we successfully perform closed-loop control of one folded HASEL actuator using the sensor, which is then scaled into a deformable tilting platform of six units (one HASEL actuator and one sensor) that control a desired end effector position in 3D space. This work demonstrates the first instance of sensing electro-hydraulic deformation using a magnetic sensing mechanism. The ability to more accurately and precisely sense and control HASEL actuators and similar soft actuators is necessary to improve the abilities of soft, robotic platforms.

Assessment of streamwater age using water stable isotopes in a headwater catchment of the central Tibetan Plateau

Global warming has significantly impacted the hydrological processes in alpine cryosphere region. Water age is an essential descriptor of the hydrological function within a catchment. However, the mechanism of streamwater age variability remains unclear due to limited observational data and high altitudes of alpine catchment. In this study, long-term stable isotopic data on streamwater in a catchment in the central Tibetan Plateau (TP) were collected to assess the water age using the sine-wave approach and gamma distribution. Results showed that the mean streamwater age was 77 days, and that 30 % of streamwater was less than 41 days old on average. The streamwater age in this study was relatively younger than that in low-elevation natural catchments, indicating that the rapid drainage process occurs within the glacier and permafrost catchment. The fraction of young water (Fyw) of the streamwater decreased from 39 % at an upstream site to 28 % at the outlet, revealing the impact of permafrost (low Fyw: 25 %) on streamwater age. These variabilities were related to glacier and permafrost coverage, specifically in catchments with higher glacier coverage that are prone to have a lower water age. Temporally, the streamwater age was significantly influenced by precipitation, relative humidity, and glacier change and, to a lesser extent, permafrost change. Mechanically, glacier and permafrost changes influenced the water age by increasing the vertical flowpath length. This study provides new insights into the change in hydrological processes in alpine headwater catchments under global warming.

One-Step Fabrication of Paper-Based Inkjet-Printed Graphene for Breath Monitor Sensors

Irregularities in breathing patterns can be detected using breath monitor sensors, and this help clinicians to predict health disorders ranging from sleep disorders to heart failures. Variations in humidity during the inhalation and exhalation of breath have been utilized as a marker to detect breath patterns, and graphene-based devices are the favored sensing media for relative humidity (RH). In general, most graphene-based RH sensors have been used to explore resistance change as a measurement parameter to calibrate against the RH value, and they are prone to noise interference. Here, we fabricated RH sensors using graphene ink as a sensing medium and printed them in the shape of interdigital electrodes on glossy paper using an office inkjet printer. Further, we investigated the capacitance change in the sensor for the RH changes in the range of 10-70%. It exhibited excellent sensitivity with 0.03 pF/% RH, good stability, and high intraday and interday repeatability, with relative standard deviations of 1.2% and 2.2%, respectively. Finally, the sensor was embedded into a face mask and interfaced with a microcontroller, and capacitance change was measured under three different breathing situations: normal breathing, deep breathing, and coughing. The result show that the dominant frequency for normal breath is 0.22 Hz, for deep breath, it is 0.11 Hz, and there was no significant dominant cough frequency due to persistent coughing and inconsistent patterns. Moreover, the sensor exhibited a short response and recovery time (<5 s) during inhalation and exhalation. Thus, the proposed paper-based RH sensor is promising wearable and disposable healthcare technology for clinical and home care health applications.

Contrasting effects of lake breeze and urbanization on heat stress in Chicago metropolitan area

This study used the latest Weather Research and Forecasting (WRF) model coupled with multilayer urban canopy models to investigate contrasting effects from urbanization and lake breeze on summer heat stress over the Chicago metropolitan area (CMA). Comparisons between the model and in situ observations show that this coupled modeling system better captures urban locations' diurnal pattern of surface air temperature, skin temperature and relative humidity, with root mean square error reduced from 1.58 to 1.80 °C to 1.14–1.31 °C, 3.11–3.55 °C to 1.81–2.21 °C, and 10.73–11.35% to 7.84–8.60%, respectively, compared to WRF without coupling the urban canopy models. Two sensitivity experiments were conducted to isolate the influence of lake breeze and urbanization: one replaced the urban land use with cropland over the CMA, and the other filled all of Lake Michigan with cropland. Three different heat stress indices were computed to assess the uncertainties of heat stress response to changes in air temperature, relative humidity, and wind conditions. Results show that, when the lake has the largest cooling effect on air temperature, it also increases the relative humidity the most, and vice versa for urban warming and drying effects. Urbanization intensifies heat stress at night, and extends the heat caution period by up to 4 h over inland urban grids; the lake breeze relieves heat stress during afternoon (when the heat stress is the worst), and shortens the heat caution period by 1–3 h over inland urban grids and 3–4 h over coastal urban grids. The intensification of heat stress over the CMA due to urbanization is more than four times greater than the reduction from the lake breeze in the late afternoon and evening.

Numerical analysis of coupled heat and mass transfer processes in packaged tomatoes throughout the cold chain

This study simulated the heat- and mass-transfer characteristics of fresh tomatoes by developing a computational fluid dynamics model. The root-mean-square error (RMSE) and mean absolute percentage error (MAPE) for the tomato temperature were 0.579 °C and 3.89%, respectively, and the RMSE and MAPE for the tomato mass loss were 0.737 g and 9.87%, respectively. Furthermore, the effect of different cold chain breaking (CCB) parameters on fluctuations in tomato temperature and mass loss were quantified by a sensitivity analysis. The results indicate that CCB increases the tomato temperature and moisture loss compared with an uninterrupted cold chain, especially for the tomato moisture loss during the second CCB because of the irreversibility and superposition of this negative effect. Furthermore, CCB would increase the inhomogeneity of the temperature distribution of packaged tomatoes but significantly reduce the inhomogeneity of tomato mass loss. Additionally, tomato temperature fluctuations are less sensitive to changes in relative humidity during the CCB process, and the sensitivity between them is almost two orders of magnitude less than the sensitivity of other CCB parameters. However, the loss of tomato mass proved to depend most strongly on variations in relative humidity and the least on variations in the CCB temperature.

Meteorological Influences on Reference Evapotranspiration in Different Geographical Regions

It is critical to understand how meteorological variables impact reference evapotranspiration (ETo) since meteorological variables have a different effect on ETo. This study examined the impact of meteorological variables on ETo on the Korean Peninsula under complex climatic and geographic conditions in order to understand how ETo and meteorological variables have changed over the past 42 years. Different geographical conditions were analyzed, including plains, mountains, and coastal areas on a seasonal and annual basis. ETo was estimated using the Penman-Monteith method by the Food and Agriculture Organization (FAO) using daily relative humidity (RH), solar radiation (Rs), maximum temperature (Tmax), minimum temperature (Tmin), and wind speed (Ws). According to the results, the maximum mean seasonal and annual ETo occurred on the southern coast, while the minimum occurred in the mountainous area and along the east coast. Seasonal ETo is highest in summer, and is lowest in winter for all regions. The investigation of meteorological variables on ETo revealed that the response varied by area, and the magnitudes of sensitivity varied by location and season. RH is the most critical meteorological variable to affect ETo in all seasons, except summer, when Tmin is the most sensitive parameter. The results revealed that different regions showed different responses to the change in ETo by changing the meteorological variables. Meteorological variables affecting ETo differ with different geologic conditions and seasons. in mountainous areas revealed almost similar responses to the change in RH, Rs, and Tmax (±10% change in ETo) during the spring season. However, for other regions, RH and Tmax caused changes to ETo throughout, ranging from −15% to +20% in the plain area, −20% to +15% in the west and east coast, and −20% to +10% in the south coast. In addition, there were significant differences in parameter responses between regions and seasons, which was confirmed by the results.

Uncertainty analysis of polymer-based capacitive relative humidity sensor at negative temperatures and low humidity levels

Capacitive relative humidity sensors, widely used in industrial and environmental applications, should be interchangeable and ideally have parametrizable response to relative humidity changes. While the effects of temperatures in the range between 0 °C and 50 °C are negligible, this is not the case for negative values. Therefore, this effect must be taken into consideration when parameterizing the output of the capacitive humidity sensors for temperatures below the freezing point of water. In this paper, we present our investigations on the temperature effect for one type of such sensors when using it at subzero temperatures. The experiments were conducted at temperatures of −10 °C, −20 °C and −30 °C. Additionally, we have tested the sensor performance at relative humidity levels low enough for most sensors not exhibit their best performances. Direct and inverse calibration methods were used and the uncertainty analysis of the devices under test is discussed.

Research on the Effects of Environmental Factors on the Emission of Volatile Organic Compounds from Plastic Track.

The volatile organic compounds (VOCs) released from a plastic track can cause stimulation and damage to the human body; the temperature, relative humidity (RH) and air exchange rate (AER) have a significant impact on the release of VOCs from materials. In this study, we used a 0.1 m3 environmental chamber; a qualitative and quantitative analysis of VOCs released from a plastic track was conducted by gas chromatography-mass spectrometry with a temperature range of 23-60 °C, RH of 5-65% and AER of 0.5-1.5 h-1. The formation rate, the speciation, the nature of the main compounds and the mass concentration of VOCs under different environmental conditions were determined. It is shown that with the increase of temperature, the concentration of some main VOCs gradually increased and the Calkane and Coxygenated organic compounds were larger by 736.13 μg·m-3 and 984.22 μg·m-3 at 60 °C, respectively. Additionally, with the increase of RH, the concentration of different VOCs gradually increased. Nonetheless, the change in RH had no effect on the concentration percentage of different VOCs in the total VOC. With the increase in AER, the concentration of different main VOCs significantly declined, as did the VOC detection rate. When the AER was increased from 0.5 h-1 to 1.5 h-1, the Calkane decreased by 206.74-254.21 μg·m-3 and Coxygenated organic compounds decreased by 73.06-241.82 μg·m-3, and the number of non-detected VOC monomers increased from 1 to 7-12 species. The conclusion is that the increase in temperature and RH can promote the emission of VOCs from a plastic track, while increasing AER significantly reduces the concentrations of VOCs. Environmental temperature mainly causes the changes in the concentrations of different VOCs, and RH is a main factor leading to the variation in the detection rate of main VOCs. Overall, the release of VOCs from a plastic track is affected by environmental temperature, AER and RH in sequence. Through this paper, we clarify the effects of ambient temperature, RH and AER on the emission of VOCs from a plastic track, and furthermore, we determine the release characteristics of plastic track VOCs.