Article
Meteorology & Atmospheric Sciences
Yi Wang, Xiaomang Liu, Dan Zhang, Peng Bai
Summary: The moisture of precipitation in China originates from terrestrial and oceanic evaporation. In this study, the moisture sources of precipitation in China during 1980-2018 were investigated. It was found that oceanic evaporation contributed the most to the increasing precipitation trend in China, followed by vegetation transpiration. The increasing moisture from vegetation transpiration could be attributed to nationwide afforestation projects in China.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Biodiversity Conservation
John C. O'Connor, Stefan C. Dekker, Arie Staal, Obbe A. Tuinenburg, Karin T. Rebel, Maria J. Santos
Summary: This study has found that forests in 10 out of 14 biomes globally have a significant buffering effect on precipitation variability downwind, particularly reducing the coefficient of variation of monthly precipitation by 60% if 50% of precipitation originates from forests. Conversely, a high fraction of precipitation from non-forest land sources tends to increase precipitation variability. The results highlight the importance of land cover composition in the precipitationshed for buffering precipitation variability downwind.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Biodiversity Conservation
Yan Li, Ru Xu, Kun Yang, Yanxu Liu, Shuai Wang, Sha Zhou, Zhao Yang, Xiaoming Feng, Chunyang He, Zhengjie Xu, Wenwu Zhao
Summary: The ecosystems of the Tibetan Plateau play a vital role in regulating precipitation, with grasslands making the largest contribution. Over the past two decades, increased evapotranspiration in the Tibetan Plateau has led to an increase in precipitation contribution to both the plateau and downwind regions. This study provides quantitative evidence of the precipitation regulation services offered by the Tibetan Plateau ecosystems.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Xiucang Li, Ping Wu, Yihui Ding, Yanju Liu, Qingquan Li
Summary: Using an improved two-dimensional precipitation recycling model, this study calculated the precipitation recycling ratio (p) on the Tibetan Plateau and quantified the contributions of internal and external cycling precipitation to changes in total precipitation. The results showed that the recycling process was stronger in summer than in other seasons, and there was an increasing trend over most areas of the plateau. However, some western regions exhibited a weakening trend. The changes in total precipitation were mainly influenced by external cycling precipitation.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Tyler S. Harrington, Jesse Nusbaumer, Christopher B. Skinner
Summary: This study examines the contribution of land surface evapotranspiration to precipitation in North America. It finds that a large portion of summertime precipitation in the region is sourced from land surface evapotranspiration, with over 50% originating from transpiration alone. Precipitation in the southern and western regions is mainly influenced by local moisture recycling, while in the northern and eastern regions, it is dominated by remotely sourced moisture, particularly from transpiration. The findings provide key insights for drought prediction and water resource management.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Environmental Sciences
Tao Su, Siyuan Sun, Shuting Wang, Dexiao Xie, Shuping Li, Bicheng Huang, Qianrong Ma, Zhonghua Qian, Guolin Feng, Taichen Feng
Summary: This study examined the changes in actual evapotranspiration (ETa) in northern China and found a significant increase in ETa from 1982 to 2017. ETa showed a stronger correlation with precipitation compared to other factors, and the spatial patterns of ETa did not completely align with those of precipitation. Positive potential evapotranspiration anomalies resulted in a higher increase in ETa than in precipitation.
Article
Environmental Studies
Yanmin Shuai, Yanjun Tian, Congying Shao, Jiapeng Huang, Lingxiao Gu, Qingling Zhang, Ruishan Zhao
Summary: Evapotranspiration (ET) is a key eco-hydrological parameter that plays a crucial role in understanding sustainable ecosystem development. This study investigates the spatio-temporal characteristics of ET in cultivated land, grassland, and forests in Northwest China and quantifies the impact of vegetation changes on ET. The findings provide valuable insights for sustainable ecosystem development and the rational utilization of limited water resources.
Article
Engineering, Civil
Linshan Yang, Qi Feng, Meng Zhu, Liuming Wang, Mohammad Reza Alizadeh, Jan F. Adamowski, Xiaohu Wen, Zhenliang Yin
Summary: Actual evapotranspiration has significantly increased in northwest China due to recent climate and vegetation changes. Precipitation, temperature, and NDVI were identified as the main factors influencing the increase in annual evapotranspiration. The study used reliable datasets and modified methods to improve the understanding of ETa variation and its drivers.
JOURNAL OF HYDROLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Cong Xie, Liangju Zhao, Christopher J. Eastoe, Xiaohong Liu, Ninglian Wang, Zihan Zhang, Xiying Dong, Hang Liu
Summary: Seasonal and interannual variations in stable isotopes of precipitation in Xi'an, Northwest China, exhibit a consistent annual cycle, with maximum values occurring in the pre-monsoon season and minimum values in the late monsoon to post-monsoon seasons. Maps of water sources and wind fields, combined with isotope data and monsoon intensity indices, suggest that moisture sources during the monsoon come from the Bay of Bengal or recycled from land surfaces, while during the pre-monsoon they come from westerly circulation passing north of the Tibetan Plateau, and during the post-monsoon, they come from recycled monsoon moisture influenced by the South Asian Summer Monsoon.
ATMOSPHERIC RESEARCH
(2022)
Article
Environmental Sciences
Zesu Yang, Qiang Zhang, Yu Zhang, Ping Yue, Liang Zhang, Jian Zeng, Yulei Qi
Summary: As a land-atmosphere coupling hot spot, the northern China climate transition zone exhibits significant spatial and temporal variations in land-atmosphere coupling strength, which are influenced by soil moisture and air temperature.
Article
Environmental Sciences
Shengpeng Cao, Lifeng Zhang, Yi He, Yali Zhang, Yi Chen, Sheng Yao, Wang Yang, Qiang Sun
Summary: This study examines the characteristics and relationships between meteorological and agricultural drought in Northwest China. It analyzes the contributions of climate factors and human activities to agricultural drought. The results show a slowdown in meteorological and agricultural drought, with different responses in different climatic zones and vegetation types. Human activities have a significant impact on agricultural drought, especially in certain regions. This study provides valuable insights for assessing the relationship between drought and disaster.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Meteorology & Atmospheric Sciences
Yang Yang, Zhaohui Lin, Lifeng Luo, Linhao Zhong, Dabang Jiang
Summary: Land-atmosphere coupling is a critical process that influences surface air temperature over humid-dry transition zones. Through analyzing ERA5/ERA5-land reanalysis datasets, we find a significant correlation between summer temperature anomalies in Northwest China and land-atmosphere coupling strength from 1981 to 2020. Among the four pathways of land-air temperature coupling, the SM-sensible heat flux-air temperature pathway is most closely related to summer temperature changes. By analyzing physical links, we show that wave trains intensify westerly airflow over Eurasia, leading to convergence of moisture in Northwest China and causing excessive precipitation and deficient solar radiation, resulting in enhanced land-atmosphere coupling strength.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Environmental Sciences
Zhiyi Li, Abuduwaili Abulikemu, Kefeng Zhu, Ali Mamtimin, Yong Zeng, Jiangang Li, Aerzuna Abulimiti, Zulipina Kadier, Abidan Abuduaini, Chunyang Li, Qi Sun
Summary: This study investigated the diurnal variation characteristics and basic statistical features of summer precipitation in the Ili region from 2015 to 2019 using the WRF_NJU model simulation data. The results showed that the precipitation pattern exhibited high values in the east and low values in the west, with higher values over the mountainous area. The diurnal variation characteristics of precipitation in terms of hourly precipitation amount, precipitation frequency, and precipitation intensity were similar, with peaks occurring at different times in the mountainous and valley areas.
Article
Environmental Sciences
Yanlong Kong, Ke Wang, Sheng Pan, Yaqian Ren, Weizun Zhang
Summary: Stable isotopes (O-18/O-16 and H-2/H-1) can be used to understand water circulation by serving as fingerprints of water molecules. Using the HYSPLIT model, this study identifies different moisture sources and characterizes the isotopic composition of meteoric precipitation in Northwest China. The results reveal that the westerlies have a dominant influence throughout the year, while other moisture sources only affect specific regions during certain seasons.
Article
Geosciences, Multidisciplinary
Jose A. Posada-Marin, Paola A. A. Arias, Fernando Jaramillo, Juan F. F. Salazar
Summary: Through a 40-year forward tracking simulation and composite analysis, it has been found that El Nino significantly affects terrestrial moisture recycling (TMR). The impact of El Nino on TMR varies in different regions, with increased TMR in the Southern Hemisphere and decreased TMR in the Northern Hemisphere and tropics. The changes in TMR can help explain the precipitation changes caused by El Nino globally.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Dongnan Jian, Xiucang Li, Hemin Sun, Hui Tao, Tong Jiang, Buda Su, Heike Hartmann
JOURNAL OF HYDROMETEOROLOGY
(2018)
Article
Geography, Physical
Shanshan Wen, Buda Su, Yanjun Wang, Thomas Fischer, Xiucang Li, Yizhou Yin, Gao Chao, Run Wang, Tong Jiang
GLOBAL AND PLANETARY CHANGE
(2018)
Article
Geography, Physical
Xiucang Li, Marco Gemmer, Jianqing Zhai, Xuefeng Liu, Buda Su, Yanjun Wang
QUATERNARY INTERNATIONAL
(2013)
Article
Environmental Sciences
Mingjin Zhan, Jianqing Zhai, Hemin Sun, Xiucang Li, Lingjun Xia