This paper provides an overview of the impacts of the original works of Professor Duzheng YE on a selected set of observational and model studies with which the present author has been associated over the past several...This paper provides an overview of the impacts of the original works of Professor Duzheng YE on a selected set of observational and model studies with which the present author has been associated over the past several decades. The main themes of these works include atmospheric energy dispersion, air–land interactions over the Tibetan Plateau, and El Ni n？orelated air–sea coupling over East Asia.The dispersive behavior of observed atmospheric fluctuations accompanying cold surge events in East Asia is demonstrated. Cold air outbreaks over Korea and southern China are coincident with the successive downstream development of troughs and ridges, with the group velocity of such wave packets being notably faster than the phase propagation speed of individual troughs and ridges. In a more general context, dispersive features are also discernible from lagged teleconnection charts and cross-spectra of observed and model-simulated geopotential height variations on 10–30-day time scales.Using the output from a high-resolution general circulation model, the relative contributions of condensational, sensible, and radiative heating to the atmospheric energy budget over the Tibetan Plateau are documented. The rapid changes of the upper tropospheric Tibetan anticyclone and East Asian mei-yu（＂plum rain＂） precipitation band associated with the development of the Asian monsoon system are described.The principal anomalies in sea level pressure, surface wind, precipitation and sea surface temperature over southeastern China and the Philippine Sea region during El Nio events are presented. The contributions of remote El Nio-related forcing and local air–sea interaction to the occurrence of these anomalies are assessed.展开更多
Chinese seventh Arctic scientific expedition began from Shanghai on July 11,2016,journeying through the Bering Sea—Chukchi Sea—Canada Basin area—submarine plateau of the Chukchi Sea—high latitudes Arctic Ocean—Me...Chinese seventh Arctic scientific expedition began from Shanghai on July 11,2016,journeying through the Bering Sea—Chukchi Sea—Canada Basin area—submarine plateau of the Chukchi Sea—high latitudes Arctic Ocean—Mendeleyev Ridge and covered more than 13 000 n mile in 78 days.The distance travelled in floating ice area is more than 2 800 n mile and the northernmost point of the展开更多
基金partially supported by the AXA Research Fundprovided by the Chinese University of Hong Kong through grants 4720195,4930075 and 4930744
文摘This paper provides an overview of the impacts of the original works of Professor Duzheng YE on a selected set of observational and model studies with which the present author has been associated over the past several decades. The main themes of these works include atmospheric energy dispersion, air–land interactions over the Tibetan Plateau, and El Ni n？orelated air–sea coupling over East Asia.The dispersive behavior of observed atmospheric fluctuations accompanying cold surge events in East Asia is demonstrated. Cold air outbreaks over Korea and southern China are coincident with the successive downstream development of troughs and ridges, with the group velocity of such wave packets being notably faster than the phase propagation speed of individual troughs and ridges. In a more general context, dispersive features are also discernible from lagged teleconnection charts and cross-spectra of observed and model-simulated geopotential height variations on 10–30-day time scales.Using the output from a high-resolution general circulation model, the relative contributions of condensational, sensible, and radiative heating to the atmospheric energy budget over the Tibetan Plateau are documented. The rapid changes of the upper tropospheric Tibetan anticyclone and East Asian mei-yu（＂plum rain＂） precipitation band associated with the development of the Asian monsoon system are described.The principal anomalies in sea level pressure, surface wind, precipitation and sea surface temperature over southeastern China and the Philippine Sea region during El Nio events are presented. The contributions of remote El Nio-related forcing and local air–sea interaction to the occurrence of these anomalies are assessed.
基金The Chinese Polar Environment Comprehensive Investigation and Assessment Programmes,State Oceanic Administration under contact Nos CHINARE2016–03–01,CHINARE2016–03-02,CHINARE2016–03-03,CHINARE2016–03-04,and CHINARE2016–03-05
文摘Chinese seventh Arctic scientific expedition began from Shanghai on July 11,2016,journeying through the Bering Sea—Chukchi Sea—Canada Basin area—submarine plateau of the Chukchi Sea—high latitudes Arctic Ocean—Mendeleyev Ridge and covered more than 13 000 n mile in 78 days.The distance travelled in floating ice area is more than 2 800 n mile and the northernmost point of the
