Influence Of Solar Radiation Research Articles

Contribution of solar radiation and geomagnetic activity to global structure of 27-day variation of ionosphere

Twenty-seven-day variation caused by solar rotation is one of the main periodic effects of solar radiation influence on the ionosphere, and there have been many studies on this periodicity using peak electron density \(\mathrm{N_{m}F_{2}}\) and solar radio flux index F10.7. In this paper, the global electron content (GEC) and observation of Solar EUV Monitor (SEM) represent the whole ionosphere and solar EUV flux, respectively, to investigate the 27-day variation. The 27-day period components of indices \((\hbox {GEC}_{27}\), \(\hbox {SEM}_{27}\), \(\hbox {F10.7}_{27}\), \(\hbox {Ap}_{27})\) are obtained using Chebyshev band-pass filter. The comparison of regression results indicates that the index SEM has higher coherence than F10.7 with 27-day variation of the ionosphere. The regression coefficients of \(\hbox {SEM}_{27 }\) varied from 0.6 to 1.4 and the coefficients of \(\hbox {Ap}_{27}\) varied from \({-}\)0.6 to 0.3, which suggests that EUV radiation seasonal variations are the primary driver for the 27-day variations of the ionosphere for most periods. TEC map grid points on three meridians where IGS stations are dense are selected for regression, and the results show that the contribution of solar EUV radiation is positive at all geomagnetic latitudes and larger than geomagnetic activity in most latitudes. The contribution of geomagnetic activity is negative at high geomagnetic latitude, increasing with decreasing geomagnetic latitudes, and positive at low geomagnetic latitudes. The global structure of 27-day variation of ionosphere is presented and demonstrates that there are two zonal anomaly regions along with the geomagnetic latitudes lines and two peaks in the north of Southeast Asia and the Middle Pacific where \(\hbox {TEC}_{27}\) magnitude values are notably larger than elsewhere along zonal anomaly regions.

Ceilometer-Based Analysis of Shanghai’s Boundary Layer Height (under Rain- and Fog-Free Conditions)

AbstractTo investigate the boundary layer dynamics of the coastal megacity Shanghai, China, backscatter data measured by a Vaisala CL51 ceilometer are analyzed with a modified ideal curve fitting algorithm. The boundary layer height zi retrieved by this method and from radiosondes compare reasonably overall. Analyses of mobile and stationary ceilometer data provide spatial and temporal characteristics of Shanghai’s boundary layer height. The consistency between when the ceilometer is moving and stationary highlights the potential of mobile observations of transects across cities. An analysis of 16 months of zi measured at the Fengxian site in Shanghai reveals that the diurnal variation of zi in the four seasons follows the expected pattern; for all seasons zi starts to increase at sunrise, reflecting the influence of solar radiation. However, the boundary layer height is generally higher in autumn and winter than in summer and spring (mean hourly averaged zi for days with low cloud fraction at 1100–1200 local time are 900, 654, 934, and 768 m for spring, summer, autumn, and winter, respectively). This is attributed to seasonal differences in the dominant meteorological conditions, including the effects of a sea breeze at the near-coastal Fengxian site. Given the success of the retrieval method, other ceilometers installed across Shanghai are now being analyzed to understand more about the spatial dynamics of zi and to investigate in more detail the effects of prevailing mesoscale circulations and their seasonal dynamics.

Multifarious slips perception on unsteady Casson nanofluid flow impinging on a stretching cylinder in the presence of solar radiation

In the present work, a study is prepared for unsteady axisymmetric Casson-type nanofluid flow as a result of a contracting impermeable cylinder under the influence of solar radiation. The model of multifarious slip is included. The governing system of equations takes the form of non-linear ODEs by employing appropriate transformation and then resolve it numerically by RK-Fehlberg scheme in Maple 18 symbolic software. The effects of leading parameters on the flow characteristics are presented through tables and graphs coupled with necessary discussion and physical insinuation. Strong effects of various slip parameters on the physical quantities of interest are found here. The upsurge of surface slip is spotted to boost up temperature profile whereas it slows the flow down. However, thermal slip conducts to drop the temperature but enhancing the heat transfer rate.

Numerical simulation of thermal behaviors of a clothed human body with evaluation of indoor solar radiation

Solar radiation is a valuable green energy, which is important in achieving a successful building design for thermal comfort in indoor environment. This paper considers solar radiation indoors into the transient thermal transfer models of a clothed human body and offers a new numerical method to analyze the dynamic thermal status of a clothed human body under different solar radiation incidences. The evaluation model of solar radiation indoors and a group of coupled thermal models of the clothed human body are developed and integrated. The simulation capacities of these integrated models are validated through a comparison between the predicted results and the experimental data in reference. After that, simulation cases are also conducted to show the influence of solar radiation on the thermal status of individual clothed body segments when the human body is staying indoors in different seasons. This numerical simulation method provides a useful tool to analyze the thermal status of clothed human body under different solar radiation incidences indoors and thus enables the architect to efficiently utilize the green solar energy in building development.

Energy Conservation in an Office Building Using an Enhanced Blind System Control

The two spaces office module is usually considered as a representative case-study to analyse the energetic improvement in office buildings. In this kind of buildings, the use of a model predictive control (MPC) scheme for the climate system control provides energy savings over 15% in comparison to classic control policies. This paper focuses on the influence of solar radiation on the climate control of the office module under Belgian weather conditions. Considering MPC as main climate control, it proposes a novel distributed enhanced control for the blind system (BS) that takes into account part of the predictive information of the MPC. In addition to the savings that are usually achieved by MPC, it adds a potential 15% improvement in global energy use with respect to the usually proposed BS hysteresis control. Moreover, from the simulation results it can be concluded that the thermal comfort is also improved. The proposed BS scheme increases the energy use ratio between the thermally activated building system (TABS) and air-handling unit (AHU); therefore increasing the use of TABS and allowing economic savings, due to the use of more cost-effective thermal equipment.

Wheat yield in Spain and associated solar radiation patterns

ABSTRACTClimate variability and change can have important impacts for crop production. Therefore, the aim of this study is to investigate projections of the wheat yield in an increasingly warm climate. To address our objectives, we determined relationships between wheat yield in Spain and large‐scale variables. Partial least squares regression was applied to determine the modes of the climate variables that drive wheat‐yield variability, revealing a significant influence of surface solar radiation. Based on seasonal patterns of solar radiation, we determine models to estimate inter‐annual wheat‐yield variability. We find that the performance of the models based on solar radiation is better than that of earlier studies based on temperatures and precipitation variables. In this way, we use simulations of the Coupled Model Intercomparison Project Phase 5 (CMIP5) to project wheat‐yield trend under warming climate by implementing direct statistical downscaling. The expected range of projected wheat yield trend for 21st century indicates decreases of about 6–8% across Spain. The suggested models could be applied for adaptation and planning.

Thermal comfort in indoor environment: Effect of the solar radiation on the radiant temperature asymmetry

This paper analyzes the influence of solar radiation, considering both its direct and diffuse component, on the local thermal comfort of subjects in indoor environments. More precisely, an original equation for the assessment of the plane radiant temperature in presence of solar radiation is proposed. It can be used to evaluate the correspondent radiant asymmetry and therefore allows detailed analysis of local thermal discomfort conditions. Its reliability and feasibility have been tried out by means of an application to a simple case study and the obtained results proved that, in the studied environment, solar radiation affects the symmetry of the radiant field to a considerable extent, being the main cause of local discomfort due to not acceptable values of the radiant asymmetry. Therefore, the method can be used to verify the presence of zones not suited to human activities inside rooms and, in addition, it can be exploited by the procedures aimed at the classification of the comfort quality of indoor environments.

Julius Elster and Hans Geitel – Dioscuri of physics and pioneer investigators in atmospheric electricity

Abstract. Julius Elster and Hans Geitel contributed to the physics at the turn of the 19–20th century in many ways. We first summarize the life of these exceptional scientists. Then – owing to the topic of this journal – we focus on their atmospheric electricity research. With their experiments, careful evaluations and ingenious interpretation, Elster and Geitel made important contributions to precipitation electricity, the influence of solar radiation on the electric state of the atmosphere, the nature of charge carriers and the ionization of air by radioactivity. They proved their experimental skills by inventing new instruments with unprecedented accuracy and reliability. A very modern concept was their attitude to undertake long-term measurements at various locations. A section on their recognition in the physics community and their scientific distinctions concludes the paper.

东北城市露水凝结观测及其与常规气象要素的关系

PDF HTML阅读 XML下载 导出引用 引用提醒 东北城市露水凝结观测及其与常规气象要素的关系 DOI: 10.5846/stxb201601120074 作者: 作者单位: 吉林建筑大学 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学青年基金项目（41401229）；国家水体污染控制与治理科技重大专项（2012ZX07201004）；吉林省教育厅"十三五"科学技术研究项目（2016161） Monitoring dew condensation and its response to conventional meteorological factors in an urban ecosystem of northeastern China Author: Affiliation: Jilin Jianzhu University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:露水是城市生态系统水循环组成部分，是重要的凝结水资源和湿度来源，为了揭示"全球变暖"对我国东北地区城市露水凝结的影响，于2014和2015年植物生长季对长春市绿地区、道路区及裸土区露水强度和气象因子进行监测和相关性分析。结果表明，东北城市绿地区露水强度与相对湿度、露点温度、气温、风寒温度、太阳辐射（n=254，P<0.01）正相关，与PM2.5、PM10、空气质量指数、夜间风速、大气压（n=254，P<0.01）负相关。东北城市年露日数为132-136 d，占无霜期的62.5%左右。绿地区是城市生态系统水汽凝结的主要区域，绿地区占市区面积的比例是城市年露水量的决定因子，长春市年露水凝结量约为23-35 mm，如城市绿地区所占比例降低至5%，年露水量基本可忽略不计。东北城市露水强度可通过I=（-5.9+0.156RH-0.86Vnight+0.117Rn）×10-2（R2=0.857）模型进行模拟。结合研究区1965-2015年植物生长期夜间凝露段气候因子的变化趋势，判断东北城市生态系统露水量的变化率为-1.07 mm/10a（P<0.01）。在相对湿度、夜间风速和太阳辐射共同影响条件下，研究区气候变化对露水凝结影响不大。提供了城市不同下垫面露水监测及计算的方法，完善了不同生态系统露水监测体系，通过间接模型法构建了露水强度模拟模型，进一步明确了气候变化对近地表水循环的影响。 Abstract:In northeastern China, over the last four decades, global warming has resulted in a decrease in precipitation and increase in temperature that have intensified evaporation, resulting in a decline in soil moisture. Dew is a crucial factor in the water and nutrient cycle of urban ecosystems; thus, could exert considerable influence on the water cycle by affecting the vapor condensation. To reveal the effects of global warming on dew variation in urban ecosystems, dew was monitored daily using poplar wooden sticks, asphalt blocks, and soil blocks in the complex urban landscapes of Changchun, northeastern China. A correlation analysis was conducted between meteorological factors and dew intensity in greenbelt areas of the urban ecosystem. The results indicated that dew intensity correlated positively with relative humidity, dew point temperature, air temperature, wind chill temperature, and solar radiation (n=254, P<0.01), whereas it correlated negatively with PM2.5, PM10, air quality index, nocturnal wind speed, and atmospheric pressure (n=254, P<0.01). During the monitoring period, there were 132-136 dew days per year, which accounted for 62.5% of the frost-free season in Changchun. Substrate plays a notable roll in the formation of dew, and at night, dew intensity showed different patterns among the various landscapes. The landscapes in descending order of average dew intensity were greenbelt (0.0607 mm), bare land (0.0100 mm), and roads (0.0049 mm) (P<0.01). Dew plays an important role in the greenbelt water balance and the dewfall in July, August, and September was equal to 22.52% and 23.61% of the rainfall for the same period in 2014 and 2015, respectively. According to the proportion of each landscape, dewfall was 23-25 mm/ac in Changchun. The results suggested that increased vegetation coverage could enhance the amount of water vapor available to condense on the ground surface. However, water could not condense if the proportion of the urban greenbelt area was reduced to 5%. Based on synchronous meteorological data, a stepwise linear multiple regression model was established to predict the dew amount. The model successfully revealed the relationship between simulated and measured dew intensities. The results suggested that a warmer and drier climate would not lead to a substantial reduction in dew. Combining the model and climate data for the study area from 1965-2015 during the dew condensation period, annual dewfall showed a decreasing trend of -1.07 mm/10 ac (P<0.01). However, under the mutual influence of relative humidity, wind speed, and solar radiation, the impact of climate change on dew condensation was not obvious. The present study developed a method for monitoring and calculating dew on different underlying surfaces of an urban ecosystem, and it improved the system of dew surveillance. The established empirical model could be used to predict dew intensity and help clarify the impact of climate change on the near-surface water cycle. 参考文献 相似文献 引证文献

University Library External Window Sunshade Device Simulation Analysis and Optimization Design

Influence of solar radiation for the library external shading devices were simulated and analyzed using the Weather Tool software library exterior environment analysis, the thermal comfort of the building with minimal impact of changes in the program is to take passive shading measures, the use of ecological building Ecotect simulation software to analyze the effects of the sun visor on the building indoor solar radiation, in the CAD drawing software based on the library modeling, climate data import, mesh through Ecotect, analyzed under different circumstances in the reading room of the sun visor change the radiation given control strategy corresponding visor adjustment, and on this basis, designed a foot shading device, and more convenient for students to use.

Adaptive heat pump and battery storage demand side energy management

An adaptive linear model predictive control strategy is introduced for the problem of demand side energy management, involving a photovoltaic device, a battery, and a heat pump. Moreover, the heating influence of solar radiation via the glass house effect is considered. Global sunlight radiation intensity and the outside temperature are updated by weather forecast data. The identification is carried out after adapting to a time frame witch sufficiently homogeneous weather. In this way, in spite of the linearity an increase in precision and cost reduction of up to 46% is achieved. It is validated for an open and closed loop version of the MPC problem using real data of the ambient temperature and the global radiation.

The Influence of Solar Radiation on the Antioxidant Systems in Blood of Dairy Cows and the Processing of the Data Using Wavelets Transforms

The purpose of this paper was to observe if in cattle, exposed to the solar radiation, could be noticed a certain reaction of the organism related to the oxidative stress. The study was made in the period May - August 2014, on a group of 16 Romanian Simmental dairy cows, kept on pasture during the day. The processing of the determined data were made using wavelet transforms (In-Place Fast Haar Wavelets Transform). The results of the experiment shown that when Temperature Humidity Indexes (THI) are higher than 72 (the superior limit for thermal comfort in cattle), the oxidative stress appeared in dairy cows. This oxidative stress was mainly manifested by the increasing of superoxide dismutase with 95% in August compared to May, followed by the increasing of the catalase with 79% and of glutathione peroxidase with 13%. The increasing of the antioxidant enzymes level was directly co-related with THI. We considered that the determination of the antioxidant enzymes level was an appropriate model for studying the influence of hot environment on the oxidative status of dairy cows. The wavelets transforms can be easier applied to practical data compared to the classical statistical methods.

Development of film- and- fabric composite materials durability assessing methodology under time-dependent influences of temperature and solar radiation

In this paper, we present the design of stress-strain state calculation and film-and- fabric composite materials durability under stresses and solar radiation. We have constructed a two-dimensional finite-state-element computer model of the deforming process of the low- level cell of film-and-fabric-based composite material for the evaluation of its durability which takes into account non-linear viscoelasticity, temperature variations, ageing of the material, the process of upbuilding of microdamage and photodegradation. Qualitative research of operational factors influence (UV, temperature) on film-and-fabric composite materials durability was conducted.

Effect Of Climate And Sanitation Of Rats Population And Index Flea As Indicator Detection Yersinia pestis In Port Surabaya

Background: International Health Regulations (IHR) classifies plague as the disease is likely to recur, and has the potential to cause epidemics and extraordinary events. Objectives: analyze the influence of climate and level of sanitation to the population of rats and fleas index as an indicator of yersinia pestis in the port of Surabaya. Methods: analytic observational research with cross sectional design through testing time series and regresion linier. Population in this study are data on the number of mice caught and the number of fleas were found and observed in the laboratory of the Port Health Office of Surabaya. Results: results of linear regression analysis with p=0,001 for the influence of humidity on the population of rats, p=0,036 for the influence of solar radiation on the rat population, the value of p=0,033 for the influence of rainfall on the level of sanitation, and p=0,037 for influence the level of sanitation of the rat population, so the hypothesis is accepted. Conclusions and suggestions: There is the influence of humidity and solar radiation on the population of rats and fleas index, rainfall factors affect the level of sanitation, sanitation factors influence the rat population. Necessary to control vectors by using DUSTLON besides adding a mousetrap

The influence of high flux broadband irradiation on soot concentration and temperature of a sooty flame

This paper reports the first set of measurements of the influence of simulated concentrated solar radiation (CSR) on the soot volume fraction and temperature in a laminar non-premixed ethylene flame. Broadband irradiation that closely approximates the solar spectrum was produced with a metal-halide lamp configured in a series of three optical concentrators to achieve fluxes of up to 0.45MW/m2 in a focused area of 80mm in diameter. The radiation was used to irradiate an entire Santoro-type laminar flame of 64mm in length, where the soot volume fraction and flame temperature were measured using planar laser-induced incandescence (LII) and two-line atomic fluorescence (TLAF), respectively. The results show that the simulated concentrated solar radiation significantly influences the evolution of soot on the fuel-rich side of the flame, but does not change either the visible length or width of the flame. It causes the soot volume fraction to increase by up to 50%, the soot inception to be translated upstream by 7% of the flame length, and the consumption rate of soot in the radial direction to increase by an average value of 54% for heights greater than 10mm above the burner. The temperature of the flame was also found to increase by up to ∼100K in most of the downstream locations.

Influence of postmenopausal state, solar radiation, drugs and comorbidities on serum calcium and phosphate in 13,000 hospital admissions.

Our goal was to determine the relative contributions of demographic variables, drugs, comorbidities, and weather conditions on serum calcium (Ca) and phosphate (Pi) in patients admitted to a tertiary referral center. For 12,667 consecutive patients admitted to the Kantonsspital St. Gallen, drug history on admission, age, sex, body weight, ICD-10 diagnoses, and laboratory data were extracted from electronic medical records. Weather parameters prior to hospital admission were also integrated in a regression analysis. Serum Ca was normally distributed with a median (interquartile range) of 2.3 (2.2/2.4) mmol/L. In contrast Pi showed a right tailed distribution of 1.0 (0.9/1.2) mmol/L. Ca was increased in postmenopausal women. Solar radiation prior to admission was associated both with higher Ca and higher Pi. Lower blood pressure was associated with lower Ca and higher Pi. In addition Ca increased by 0.017 mmol/L per g/L increase of albumin (p < 0.0001). Serum Ca and Pi at hospital admission are highly dependent on patient characteristics, drugs, and comorbidities. In particular, we found higher Ca in postmenopausal women. The commonly applied albumin correction formula of Payne (0.025 mmol/L Ca per g/L albumin) may overestimate the effect of albumin; we propose using 0.017 mmol/L Ca per g/L albumin or measurement of free (ionized) Ca.

Practical considerations for enhanced-resolution coil-wrapped distributed temperature sensing

Abstract. Fibre optic distributed temperature sensing (DTS) is widely applied in Earth sciences. Many applications require a spatial resolution higher than that provided by the DTS instrument. Measurements at these higher resolutions can be achieved with a fibre optic cable helically wrapped on a cylinder. The effect of the probe construction, such as its material, shape, and diameter, on the performance has been poorly understood. In this article, we study data sets obtained from a laboratory experiment using different cable and construction diameters, and three field experiments using different construction characteristics. This study shows that the construction material, shape, diameter, and cable attachment method can have a significant influence on DTS temperature measurements. We present a qualitative and quantitative approximation of errors introduced through the choice of auxiliary construction, influence of solar radiation, coil diameter, and cable attachment method. Our results provide insight into factors that influence DTS measurements, and we present a number of solutions to minimize these errors. These practical considerations allow designers of future DTS measurement set-ups to improve their environmental temperature measurements.

Solar Technology for Obtaining Superconducting Ceramic Bi1.7Pb0.3Sr2Ca(n–1)Cu n O y (n = 3 – 5) and Studying its Properties

A technology has been developed for synthesizing a superconducting ceramic from glassy-crystalline precursors having the nominal compositions (Bi1.7Pb0.3Sr2Ca(n–1)Cu n O y (n = 3 – 5). The ceramic is synthesized in a melt under the influence of solar radiation. The dependence of the formation of superconducting phases on the temperature-time conditions is studied, and the degree of texturing based on the Lotgering factor is evaluated in relation to the temperature of the ceramic’s heat treatment. The temperature at which the ceramic transitions to the superconducting state is determined (T c = 107 – 138 K) along with its post-transition stability (>7 years).

Some aspects of energy efficient building envelope in high latitude countries

Nowadays, energy conservation in buildings is especially important for countries where high energy consumption in the residential and tertiary sectors causes the high energy intensity of the whole economy. This paper presents some idea of creating energy efficient building envelopes. The focus is on reduction of heat transfer through it. Different structures of external walls are analyzed. In high latitude countries walls should be characterized by high thermal resistance and high thermal capacity (good storage ability). In the paper traditional multilayer wall structures with specific paints on external wall surfaces are analyzed. Paints are characterized by different solar absorptivity. Two extreme cases of solar absorptivity of external wall paints (0.9 for the black paint and 0.1 for the black paint) have been taken into account to give completely different ability of the external wall surface for photo-thermal conversion (of solar radiation). Results show that in moderate or cold climates, if thick thermal insulation is applied as external layer of a building envelope, then the effect of solar absorptivity of a cover paint of external wall surface is not meaningful. In July, when daily solar irradiation is the highest, in the case of the black paint all day long there are small heat gains (about 2kJm−2 in average) with maximum in the night (3.1kJm−2). In the case of the white paint all day long there are small heat losses (about 2.3kJm−2 in average), with maximum in the middle of a day (2.7kJm−2). The effect of the solar absorptivity of the paint, that covers the external surface of the wall, can be seen, but it is very small and perhaps cannot be noticed by inhabitants. However, in the extreme summer weather conditions, i.e. very high irradiance level and high ambient air temperature, what have happened quite often in high latitude countries recently, the considered effect is more strong. Therefore, it would be good to apply envelope of a building, that can change “the skin” from summer to winter. Also modern structures with the Phase Change Materials (PCMs) are analyzed. In simulation study it was assumed that PCMs are applied in the form of light thermal mass panels that are integrated with the external wall structure. A mathematical model of dynamics of a building has been developed. In the paper stress has been put on energy transfer through walls of different structures. The model takes into account the influence of solar radiation on energy balance, including the availability of solar radiation on walls of different location (inclination and orientation). On the basis of the model developed simulation studies have been performed. Selected results of thermal behavior of some multilayer structures of external walls of a building have been analyzed. Through comparative studies some recommendations for creating building wall structures have been formulated. Results (presented in figures) show, how the temperature of a wall surface can increase because of the high solar radiation absorptivity of the surface paint. The temperature is especially high when a thick insulation is used. Because of the insulation the heat transfer through the wall is reduced significantly. If there is no insulation than the heat gained can be conducted (relatively easily) through the wall to the interior of a building, in consequence there are high heat gains in summer, and the temperature of the external wall surface is not high. It is evident that external surface temperature is not the basic parameter that determines the real heat transfer through a wall. Results show that in high latitude countries a wall structure for a standard building (used all year around) must contain thermal insulation as external layer. This is also true when the PCMs are applied in the form of light thermal mass panels. For high latitude countries the recommended structure of an external wall is following: thermal insulation (e.g. mineral wool) at outside (external layer) of thickness of 25cm and PCM thermal mass panel at inside (internal layer) of thickness of 1cm. Such wall structure assures full reduction of the ambient surrounding influence. An external wall made of a brick and a PCM panel does not have high enough thermal resistance (even if thermal capacity is high) to keep the room temperature at the required level. However, such structure could be recommended for the summer season, e.g. for summer houses in a moderate climate or high latitude countries, or for warm climate.

Mapping of the seasonal dynamic properties of building walls in actual periodic conditions and effects produced by solar radiation incident on the outer and inner surfaces of the wall

In this work, the dynamic characteristics of the external walls of air-conditioned buildings subject to the joint action of periodic non-sinusoidal external and internal loadings are determined. The dynamic parameters used are the energy decrement factor, which is evaluated by means of the fluctuating heat flux in a semi-period exiting and entering the wall, the decrement factor of the maximum peak and minimum peak of the heat flux in a period and the relative time lags. The fluctuating heat flux in the wall in steady periodic regime conditions is determined with an analytical model obtained by resolving the equivalent electrical circuit. The preceding parameters are used for a study of the influence of solar radiation on the dynamic characteristics of the walls in summer and winter air-conditioning. Solar radiation is considered as operating on the external surface and on the internal surface due to the presence in the indoor environments of a shortwave radiant field. The absorbed solar heat flux by the external surface varies, modifying the solar absorption coefficient and wall orientation. Indoors, we considered a continuous operating regime of the plant and a regime with nocturnal attenuation.The results obtained, relating to 1152 different boundary conditions, were used for the construction of maps of dynamic characteristics, different on variation of the plant functioning regime and of the shortwave radiant load on the internal surface. The maps show the dependence of the decrement factors and of the time lags on variation of the season, of the external surface absorption coefficient, of the orientation and the type of wall, and of the locations. This representation allows a comparison of the dynamic behaviour of the wall in the two air conditioning seasons and, for defined boundary conditions, to quickly determine the dynamic characteristics.