Abstract
The temperate forests in Northeast China are an important ecological barrier. However, the way in which temperate forests regulate the regional temperature and water cycling remains unclear. In this study, we quantitatively evaluated the role that temperate forests play in the regulation of the regional temperature and precipitation by combining remote sensing observations with a state-of-the-art regional climate model. Our results indicated that the forest ecosystem could slightly warm the annual air temperature by 0.04 ± 0.02 °C and bring more rainfall (17.49 ± 3.88 mm) over Northeast China. The temperature and precipitation modification function of forests varies across the seasons. If the trees were not there, our model suggests that the temperature across Northeast China would become much colder in the winter and spring, and much hotter in the summer than the observed climate. Interestingly, the temperature regulation from the forest ecosystem was detected in both forested regions and the adjacent agricultural areas, suggesting that the temperate forests in Northeast China cushion the air temperature by increasing the temperature in the winter and spring, and decreasing the temperature in the summer over the whole region. Our study also highlights the capacity of temperate forests to regulate regional water cycling in Northeast China. With high evapotranspiration, the forests could transfer sufficient moisture to the atmosphere. Combined with the associated moisture convergence, the temperate forests in Northeast China brought more rainfall in both forest and agricultural ecosystems. The increased rainfall was mainly concentrated in the spring and summer; these seasons accounted for 93.82% of the total increase in rainfall. These results imply that temperate forests make outstanding contributions to the maintainance of the sustainable development of agriculture in Northeast China.
Highlights
We estimated the biophysical impact of temperate forests on both the local and regional temperature by combining a land surface model and a high-resolution regional climate model
We quantitatively evaluated the role perspective of regional climate regulation
We quantitatively evaluated the that temperate forests play in the regulation of the regional temperature and precipitation role that temperate forests play in the regulation of the regional temperature and precipipattern by combining remote sensing observations and a state-of-the-art regional climate tation pattern by combining remote sensing observations and a state-of-the-art regional model (WRF)
Summary
Forest ecosystems are some of the crucial components of the terrestrial ecosystem. They provide a variety of ecosystem services, including water and soil conservation, carbon concentrations, climate regulation, and biodiversity maintenance, etc. Reforestation or afforestation is regarded as one of the most effective natural climate solutions in terms of maintaining warming below 2 ◦ C [4,5]. China and various other countries have launched a series of forest protection and restoration programs to make full use of the role that
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