Article
Geosciences, Multidisciplinary
Dalei Hao, Gautam Bisht, Yu Gu, L. Ruby Leung
Summary: Solar radiation-topography interaction plays important roles in the climate of the Tibetan Plateau and Asian regions. It regulates the surface energy balance, snow processes, and surface climate over the Tibetan Plateau. Considering this interaction improves the simulation of surface climate, reducing the winter cold bias and mitigating the wet bias in summer precipitation.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
JianDong Li, Wei-Chyung Wang, GuoXing Chen, QingLong You
Summary: Observations indicate that the Tibetan Plateau has the largest positive radiation budget among land regions in the same latitudes. However, most models underestimate this budget and show substantial differences in absorbed shortwave radiation. The study emphasizes the importance of land surface states and clouds in modeling the climate of the Tibetan Plateau.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Xin Miao, Weidong Guo, Bo Qiu, Sha Lu, Yu Zhang, Yongkang Xue, Shufen Sun
Summary: This study highlights the importance of considering topographic effects in simulating snow cover distribution and land surface energy budget for reducing the cold bias in winter climate simulations over the Tibetan Plateau.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Yuting Qi, Lei Zhong, Yaoming Ma, Yunfei Fu, Xian Wang, Peizhen Li
Summary: Land surface temperature (LST) is crucial in the Earth's climate system, and its retrieval from satellites is challenging, especially in plateau areas. This study used various methods, including the single channel (SC) algorithm, the split-window (SW) algorithm, and machine learning (ML) models, to improve LST retrieval accuracy over the Tibetan Plateau (TP). The SW algorithm showed better performance, with a lower root-mean-square error (RMSE) of 2.64 K, compared to the official SLSTR LST products (5.23 K), and the random forest model had the highest accuracy with an RMSE of 3.26 K.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2023)
Article
Environmental Sciences
Ziyuan Tan, Yuzhi Liu, Qingzhe Zhu, Tianbin Shao
Summary: This study proposes a mechanism for the differential impact of the Tibetan Plateau on dust transport from northern and southern deserts neighboring the plateau, highlighting the crucial role of Tibetan topography. By adjusting atmospheric circulations, the Tibetan topography can influence dust emission locations and strengthen dust emissions in different deserts.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
Chen Sheng, Guoxiong Wu, Yiqiong Tang, Bian He, Yongkun Xie, Tingting Ma, Ting Ma, Jinxiao Li, Qing Bao, Yimin Liu
Summary: The study reveals the significant vertical and horizontal components of surface potential vorticity on the Tibetan Plateau, with the vertical component dominating and the horizontal component playing a key role, especially on the slopes. The surface potential vorticity budget equation is well balanced in terms of climate mean and synoptic processes, with a prominent diurnal cycle in June. Positive potential vorticity generation due to diabatic heating is crucial for the formation, development, and movement of the Tibetan Plateau vortex.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Environmental Sciences
Dan Zhao, Siyu Chen, Yu Chen, Yongqi Gong, Gaotong Lou, Shanling Cheng, Hongru Bi
Summary: This study investigated the distributions of dust and snow cover over the Tibetan Plateau and estimated their contributions to changes in snow cover. The results showed that dust concentrations decrease from north to south and from west to east, and are negatively correlated with snow cover in the northern region. Atmospheric dust reduces net solar radiation and increases snow cover, while dust deposited on snow decreases surface albedo and reduces snow cover through rapid snowmelt.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Ping Wu, Yan-Ju Liu, Jing Wang, Yi-Hui Ding
Summary: Due to the lack of observation data in the western Tibetan Plateau (TP), relying solely on limited data in the eastern TP to understand precipitation changes over the entire plateau is not reliable. Therefore, high-resolution precipitation data from the China Meteorological Forcing Dataset (CMFD) are used to analyze precipitation changes over the whole TP, filling the gap in understanding precipitation in the western TP. Results show that annual precipitation over the TP did not exhibit a uniform trend from 1979 to 2018, with wetting and drying trends in the northern and southern TP, respectively. Additionally, there were noticeable interdecadal shifts in seasonal precipitation regimes in the northern TP around the late 1990s.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2023)
Article
Environmental Sciences
Chunxiao Wang, Yaoming Ma, Binbin Wang, Weiqiang Ma, Xuelong Chen, Cunbo Han
Summary: The analysis of long-term observation data on the Tibetan Plateau revealed variations in radiative fluxes, surface energy balance, surface temperature, and air temperature across different stations and time scales. Shortwave radiation, influenced by the summer monsoon, showed the most significant seasonal change.
Article
Meteorology & Atmospheric Sciences
Yonghui Lei, Rui Li, Husi Letu, Jiancheng Shi
Summary: The Tibetan Plateau is an important and vulnerable water tower that supports livelihoods. By analyzing data, a comprehensive understanding of the annual cycle of recharge-storage-runoff is obtained, considering factors such as net water flux, water storage changes, runoff estimations, and river discharge measurements. Ratios of r1 and r2 reflect characteristics at the basin scale, such as buffer capacity. However, there is an imbalance between river discharge and runoff estimation in the Amu Darya basin.
JOURNAL OF HYDROMETEOROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Cunbo Han, Yaoming Ma, Binbin Wang, Lei Zhong, Weiqiang Ma, Xuelong Chen, Zhongbo Su
Summary: This study estimated multiyear (2001-2018) monthly ETa and its spatial distribution on the Tibetan Plateau (TP) using meteorological data and satellite products. Results showed a significant increase in annual ETa in the eastern sector of the TP and a decrease in the western sector, with pronounced decreases in spring and summer seasons. The estimated ETa product provides useful insights into changes in energy and water cycle on the TP.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Meteorology & Atmospheric Sciences
Jiandong Li, Zhian Sun, Yimin Liu, Qinglong You, Guoxing Chen, Qing Bao
Summary: This study reveals that contemporary climate models still face significant challenges in accurately representing complex cloud-radiation processes in Asian monsoon regions.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Environmental Sciences
Na Chang, Maoshan Li, Ming Gong, Pei Xu, Yaoming Ma, Fanglin Sun, Yaoxian Yang
Summary: This study evaluates the surface energy exchange characteristics and meteorological parameters of Mount Emei in China through the analysis of observational data. The results show that the wind speed fluctuation variance in the Mount Emei area conforms to the 1/3rd power law of the Monin-Obukhov similarity theory, but does not conform under unstable lamination and stable conditions. Additionally, there are variations in sensible heat transport and latent heat transport in different seasons, while the surface reflectance is mainly influenced by the underlying surface.
Article
Meteorology & Atmospheric Sciences
Yonghui Lei, Jiancheng Shi, Chuan Xiong, Dabin Ji
Summary: This study provides a preliminary assessment of the atmospheric-terrestrial water cycle over the Tibetan Plateau and its drainage basins, showing that the net water fluxes are closely tied to local dynamics and atmospheric water vapor. ERA5 and GRACE datasets show good correspondence in the long- and short-term variations over the Tibetan Plateau.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Wei Yu, Yimin Liu, Lianlian Xu, Guoxiong Wu, Song Yang, Dake Chen, Xiu-Qun Yang, Chundi Hu, Bian He
Summary: Using observational analysis and numerical experiments, researchers have found that the dipole mode of spring surface wind speed over the Tibetan Plateau can trigger subsequent winter El Nino-Southern Oscillation events. This is achieved through the negative sensible heating-baroclinic structure over the western TP, which affects the westerly wind anomalies over the tropical western Pacific, favoring the occurrence of El Nino events.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Hongrong Shi, Jinqiang Zhang, Bin Zhao, Xiangao Xia, Bo Hu, Hongbin Chen, Jing Wei, Mengqi Liu, Yuxuan Bian, Disong Fu, Yu Gu, Kuo-Nan Liou
Summary: A study found that there has been a rapid increase in surface solar radiation in eastern and central China from 2014 to 2019, mainly due to a significant decrease in aerosol radiative effect as a result of strict air pollution control policies.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Economics
Wen-Wen Zhang, Bin Zhao, Dian Ding, Basil Sharp, Yu Gu, Shi-Chun Xu, Jia Xing, Shu-Xiao Wang, Kuo-Nan Liou, Lan-Lan Rao
Summary: The study suggests that subnationally differentiated carbon policies based on provincial PM2.5 concentrations can be more effective in reducing CO2 and pollutant emissions compared to nationally uniform policies, leading to significant reductions in PM2.5 concentrations and elimination of high PM2.5 exposure, ultimately improving environmental equity.
Article
Meteorology & Atmospheric Sciences
Qi-Xiang Chen, Xin-Lei Han, Yu Gu, Yuan Yuan, Jonathan H. Jiang, Xue-Bo Yang, Kuo-Nan Liou, He-Ping Tan
Summary: This study comprehensively evaluated eight aerosol optical depth (AOD) products from various satellite instruments against ground-based measurements, finding that MODIS DB products generally outperform DT products and VIIRS shows the best overall performance. MISR tends to underestimate AOD in moderate and high conditions. Regional differences in AOD bias and seasonal variations in stability were observed. Further improvements are needed for extreme conditions such as very fine aerosols and high precipitable water and temperature.
ATMOSPHERIC RESEARCH
(2022)
Article
Environmental Sciences
J-L F. Li, Kuan-Man Xu, Wei-Liang Lee, J. H. Jiang, Eric Fetzer, Jia-Yuh Yu, Yi-Hui Wang, Graeme Stephens, Li-Chaio Wang
Summary: The land skin temperature (Ts) is directly influenced by surface energy balance, particularly radiative energy, and can be linked to model representation of hydrometeors in the atmosphere. The differences between simulations with and without radiative effects of falling ice hydrometeors are more pronounced in surface energy fluxes and temperature changes across different latitudinal zones. Temporal correlation analysis shows that the relationship between Ts and falling ice hydrometeor changes is stronger at high latitudes but weakened by shortwave changes at low latitudes.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Ming-Dah Chou, Kyu-Tae Lee, Il-Sung Zo, Wei-Liang Lee, Chein-Jung Shiu, Joon-Bum Jee
Summary: A new k-distribution scheme is developed for solar heating due to water vapor and CO2 without assuming correlation between absorption coefficients at different pressures. By grouping spectral points based on absorption coefficients and reference pressures, accurate calculations can be made for different climate scenarios. The results show minimal differences between k-distribution and line-by-line calculations, with potential for improvement by increasing the number of spectral groups.
JOURNAL OF THE ATMOSPHERIC SCIENCES
(2021)
Article
Geochemistry & Geophysics
Xinghui Xia, Bin Zhao, Tianhao Zhang, Luyao Wang, Yu Gu, Kuo-Nan Liou, Feiyue Mao, Boming Liu, Yanchen Bo, Yusi Huang, Jiadan Dong, Wei Gong, Zhongmin Zhu
Summary: This study proposes a spatiotemporal AOD fusion framework based on Bayesian maximum entropy methodology, which combines active and passive remote sensing to provide satellite-derived AOD data sets with high spatial coverage and accuracy. Results demonstrate that the fusion algorithm significantly improves the spatial coverage of AOD and maintains the accuracy of the original satellite AOD products.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Meteorology & Atmospheric Sciences
Xinlei Han, Bin Zhao, Yun Lin, Qixiang Chen, Hongrong Shi, Zhe Jiang, Xuehua Fan, Jiandong Wang, Kuo-Nan Liou, Yu Gu
Summary: The impact of aerosols on precipitation is a significant uncertainty in climate simulation and projection. Observational evidence suggests that dust and polluted continental aerosols increase heavy rain, while elevated smoke tends to suppress deep convective precipitation. Different aerosol types have varying effects on precipitation over land and ocean.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Astronomy & Astrophysics
Yun Lin, Yoshihide Takano, Yu Gu, Jingyu Wang, Bin Zhao, Kuo-Nan Liou, Rong Fu
Summary: The study found that in the upper Colorado River basin, the annual trend of runoff in March is more statistically significant than in other months. The decrease in cloud optical depth may lead to reduced precipitation and increased temperature in March, resulting in a reduction of available water resources.
EARTH AND SPACE SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Dalei Hao, Gautam Bisht, Meng Huang, Po-Lun Ma, Teklu Tesfa, Wei-Liang Lee, Yu Gu, L. Ruby Leung
Summary: This study analyzed and evaluated the impacts of sub-grid topographic representations on surface energy balance and boundary conditions. The results showed that sub-grid topographic effects have significant impacts on surface energy balance and boundary conditions, and the T configuration better captured these effects.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
J. -L F. Li, Kuan-Man Xu, Wei-Liang Lee, J. H. Jiang, Eric Fetzer, Graeme Stephens, Yi-Hui Wang, Jia-Yuh Yu
Summary: This study quantifies the mean radiation biases in historical climate simulations based on how frozen-hydrometeors radiative properties are calculated in CMIP6 models. The results show that models with separate treatments of cloud ice and falling ice radiative properties reduce the biases in outgoing longwave radiation and surface shortwave irradiance over deep convective regions. However, the improvement of models with combined treatments is not significant. In the south Pacific trade-wind regions, both types of treatment show similar improvements in radiation fluxes, with the separate treatment showing better performance.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
J-L F. Li, Kuan-Man Xu, Wei-Liang Lee, J. H. Jiang, Yu-Cian Tsai, Eric Fetzer, Graeme Stephens, Yi-Hui Wang, Jia-Yuh Yu
Summary: The hydrometeors-radiation interactions in climate models have different effects on the simulations of surface wind stress and sea surface temperature. The separated treatment of cloud ice and falling ice radiative properties in SON2 models performs better than NOS and SON1 models.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2022)
Article
Environmental Sciences
J. L. F. Li, Wei-Liang Lee, Kuan-Man Xu, J. H. Jiang, Yi-Hui Wang, Eric Fetzer, Graeme Stephens, Jia-Yuh Yu, Yinghui Liu
Summary: This study investigates the connection between frozen hydrometeors and sea ice in the Arctic, and quantifies the role of falling ice radiative effects (FIREs) in determining the extent and thickness of Arctic sea ice and land surface temperature. The inclusion of FIREs improves the model's representation of temperature and sea ice, suggesting the importance of FIREs in the Arctic region.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2022)
Article
Environmental Sciences
Jui-Lin F. Li, Yu-Cian Tsai, Kuan-Man Xu, Wei-Liang Lee, Jonathan H. Jiang, Jia-Yuh Yu, Eric J. Fetzer, Graeme Stephens
Summary: This study investigates the relationship between sea surface height anomaly (SSHA), surface wind stress, sea surface temperature and falling ice (snow) radiative effects (FIREs) over the tropical and subtropical Pacific Ocean. The results show that activating FIREs can improve seasonal and annual mean SSHA.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
Wan-Ling Tseng, Huang-Hsiung Hsu, Yung-Yao Lan, Wei-Liang Lee, Chia-Ying Tu, Pei-Hsuan Kuo, Ben-Jei Tsuang, Hsin-Chien Liang
Summary: This study demonstrates the superiority of a one-column ocean mixed-layer model in simulating the Madden-Julian oscillation (MJO) when coupled with three atmospheric general circulation models (AGCMs). By accurately simulating sea surface temperature and capturing temperature variations in the upper few meters of the ocean, the coupled model significantly improves MJO simulation compared to an AGCM driven by a prescribed SST. The study also identifies and corrects surface latent heat biases in the AGCMs during the preconditioning phase of MJO over the Maritime Continent (MC), and highlights the importance of changes in meridional circulation in enhancing near-surface moisture convergence during the phase of strongest convection over the MC.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Geosciences, Multidisciplinary
Dalei Hao, Gautam Bisht, Yu Gu, Wei-Liang Lee, Kuo-Nan Liou, L. Ruby Leung
Summary: Topography has significant impacts on surface energy budget, snow cover, snow depth, and surface temperature over the Tibetan Plateau. The sub-grid topographic parameterization outperforms the plane-parallel scheme in simulating these effects.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)