Impact of recent vegetation greening on temperature and precipitation over China

Yu, Lingxue; Liu, Ye; Liu, Tingxiang; Yan, Fengqin

doi:10.1016/j.agrformet.2020.108197

Cited by 97 publications

(51 citation statements)

References 62 publications

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“…In addition, regarding the WRF spatial resolution impacts, we used 15 km in the study regarding a large nested domain, focusing on the Yangtze River basin with a total area of ∼ 1.8 × 10 6 km 2 . The modeling resolution in the study was comparable with other studies that investigate the impacts of land use and cover changes over a large region (e.g., Zhang et al, 2017Zhang et al, , 2021Zha et al, 2019). However, we acknowledged that higher model resolution of WRF simulation, e.g., convection-permitting scale, may better represent rainfall processes and the land surface (Knist et al, 2020;Kurkute et al, 2020).…”

Section: Discussionsupporting

confidence: 68%

Impacts of land use and land cover change and reforestation on summer rainfall in the Yangtze River basin

Chen

et al. 2021

Hydrol. Earth Syst. Sci.

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Abstract. Land use and cover have been significantly changed all around the world during the last decade. In particular, the Grain for Green (GG) program has resulted in significant changes in regional land use and cover, especially in China. Land use and cover change (LULCC) may lead to changes in regional climate. In this study, we take the Yangtze River basin as a case study and analyze the impacts of LULCC and reforestation on summer rainfall amounts and extremes based on the Weather Research and Forecasting model. Firstly, two observed land use and cover scenarios (1990 and 2010) were chosen to investigate the impacts of LULCC on summer rainfall during the last decade. Secondly, two hypothetical reforestation scenarios (i.e., scenarios of 20 % and 50 % cropland changed to forest) were taken based on the control year of 2010 to test the sensitivity of summer rainfall (amounts and extremes) to reforestation. The results showed that average summer rainfall and extreme summer daily rainfall decreased in the Yangtze River basin between 1990 and 2010 due to LULCC. Reforestation could increase summer rainfall amount and extremes, and the effects were more pronounced in populated areas than over the whole basin. Moreover, the effects of reforestation were influenced by the reforestation proportion. In addition, the summer rainfall increased less conversely, with the transform proportion of cropland to forest increased from 20 % to 50 %. By analyzing the changes in water vapor mixing ratio, upward moisture flux, and 10 m wind, it is suggested that this result might be caused by the horizontal transportation processes of moisture. Although a comprehensive assessment of the impacts of LULCC on summer rainfall amounts and extremes was conducted, further studies are needed to investigate the uncertainty better.

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Section: Discussionsupporting

confidence: 68%

Impacts of land use and land cover change and reforestation on summer rainfall in the Yangtze River basin

Chen

et al. 2021

Hydrol. Earth Syst. Sci.

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“…Recent studies have reported that vegetation greening or vegetation growth brings significant surface cooling in China [41,48,60,[67][68][69]. Cao et al found that forest restoration attributed to the Grain to Green (GTG) programme lowered the 2-m air temperature of the Loess Plateau in summer [69].…”

Section: Impact Of Saline-alkali Land Development On Regional Climate and Corresponding Mechanismsmentioning

confidence: 99%

“…Zhang et al found that the cropland greenness increases in spring contributed to cooling and wetting effects, whereas the crop greenness decline in summer led to warming and drying effects on the North China Plain [48]. However, Yu et al found that crop greening in the Northeast China Plain in the first two decades of the 21st century cooled the surface temperature in summer [68]. Our results showed that saline-alkali land improvement could accelerate surface greening and help decrease the air temperature and increase the relative humidity, which is consistent with previous studies.…”

Section: Impact Of Saline-alkali Land Development On Regional Climate and Corresponding Mechanismsmentioning

confidence: 99%

“…It should be noted that their change in magnitude of the surface temperature is greater than our results, which can be explained by the following two observations. One is that the surface temperature response to land use change is usually more sensitive than the air temperature response [68]. The other is that Liu et al [37] used pure pixels at 1 km to calculate the surface temperature differences between saline-alkali land and paddy fields, whereas our model simulations using a 10 km horizontal resolution involved mixed pixels.…”

Section: Impact Of Saline-alkali Land Development On Regional Climate and Corresponding Mechanismsmentioning

confidence: 99%

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Impacts of Saline-Alkali Land Improvement on Regional Climate: Process, Mechanisms, and Implications

Yang

et al. 2021

Remote Sensing

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Studying land use change and its associated climate effects is important to understand the role of human activities in the regulation of climate systems. By coupling remote sensing measurements with a high-resolution regional climate model, this study evaluated the land surface changes and corresponding climate impact caused by planting rice on saline-alkali land in western Jilin (China). Our results showed that paddy field expansion became the dominant land use change in western Jilin from 2015 to 2019, 25% of which was converted from saline-alkali land; this percentage is expected to increase in the near future. We found that saline-alkali land reclamation to paddy fields significantly increased the leaf area index (LAI), particularly in July and August, whereas it decreased albedo, mainly in May and June. Our simulation results showed that planting rice on saline-alkali land can help decrease the air temperature and increase the relative humidity. The temperature and humidity effects showed different magnitudes during the growing season and were most significant in July and August, followed by September and June. The nonradiative process, rather than the radiative process, played a dominant role in regulating the regional climate in this case, and the biophysical competition between evapotranspiration (ET) and albedo determined the temperature and relative humidity response differences during the growing season.

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“…Bonan et al (2008) believe that the net climate impact of temperate forests is highly uncertain because of the competition between low albedo in winter and high ET in summer [12]. As a result, the climate effects caused by temperate forests are much more complex, with apparent regional and seasonal dependence [23][24][25][26][27]. For example, Peng et al (2014) demonstrated that afforestation in China cools the surface temperature, except in dry regions [23].…”

Section: Introductionmentioning

confidence: 99%

Biophysical Effects of Temperate Forests in Regulating Regional Temperature and Precipitation Pattern across Northeast China

Jiao

Yang

et al. 2021

Remote Sensing

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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.

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Impact of recent vegetation greening on temperature and precipitation over China

Cited by 97 publications

References 62 publications

Impacts of land use and land cover change and reforestation on summer rainfall in the Yangtze River basin

Impacts of land use and land cover change and reforestation on summer rainfall in the Yangtze River basin

Impacts of Saline-Alkali Land Improvement on Regional Climate: Process, Mechanisms, and Implications

Biophysical Effects of Temperate Forests in Regulating Regional Temperature and Precipitation Pattern across Northeast China

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