ABSTRACT: We here report our recent research results on the climatic features of Tibetan thermodynamic functions and their impacts on
the regional climates of the Northern Hemisphere. The results show that the thermodynamic processes over the Tibetan Plateau
not only strongly influence the Asian monsoon and precipitation, but also modulate the atmospheric circulation and climate
over North America and Europe through stimulating the large-scale teleconnections such as the Asian-Pacific oscillation and
affect the atmospheric circulation over the southern Indian Ocean. The Tibetan climate may be affected by sea surface temperatures
over the tropical Pacific. On the other hand, the Tibetan climate also affects the atmosphere-ocean interactions in the tropics
and mid-latitudes of the Pacific by the atmospheric circulation over the North Pacific. In spring and summer, the thermodynamic
anomalies on the plateau affect the subtropical high pressure, the Hadley circulation, and the intertropical convergence zone
over the Pacific, and then modulate the development of the El Niño/Southern Oscillation (ENSO). It is necessary to study the
forecasting methods for the development of ENSO from the Tibetan climate anomaly. This result also embodies the essence of
interactions among land, atmosphere, and ocean over the Northern Hemisphere. Since the previous studies focused on impacts
of the plateau on climates in the Asian monsoon regions, it is essential to pay more attention to studying the roles of the
plateau in the Northern Hemispheric and even global climates.
Science in China Series D Earth Sciences 04/2012; 52(11):1679-1693. · 1.59 Impact Factor
ABSTRACT: By using 2-D chemical model, the trend of total column ozone over the Tibetan Plateau is simulated. The results show that
from 1980 to 1993, the total column ozone over the Tibetan Plateau decreases; after 1995, it starts to recover. But until
2050, it will not still reach the level of 1980 total column ozone. Under Tibetan special circulation, its total column ozone
recovers more rapidly than zonal mean. Therefore, the Tibetan special meridional circulation is not a main reason why the
total column ozone over the Tibetan Plateau decreases more strongly than zonal mean.
Science in China Series D Earth Sciences 04/2012; 44:385-389. · 1.59 Impact Factor
ABSTRACT: Using NCEP dataset we calculate the exchange of mass across the thermal tropopause by the Wei’s method from 1978 to 1997 over
the Tibetan Plateau and its surroundings. We also calculate the annual variation of aerosol and ozone of 100 hPa level with
the monthly SAGE dataset from July 1988 to December 1993. Results indicate that (i) the mass from troposphere to stratosphere
is magistral station in summer over the Tibetan Plateau and its surroundings. The air transport reaches the summit in midsummer
with two large value centers, which lie in the north of Bengal Bay and southeastern Tibetan Plateau, respectively. A large
value center, which lies over the Tibetan Plateau, is smaller than that aforementioned. In winter, the mass transport is from
stratosphere to troposphere, and reaches the minimum in January. (ii) As far as the 19-year mean cross-tropopause mass exchange
from June to September is concerned, the net mass transport is 14.84×1018 kg from troposphere to stratosphere. So the area from the Tibetan Plateau to the Bengal Bay is a channel through which the
mass of lower atmosphere layer gets into upper troposphere and lower stratosphere. (iii) The cross-tropopause mass may take
the lower level aerosol to the tropopause. Then, the concentration of aerosol near the tropopause becomes larger, which may
cause the content of ozone to reduce.
Chinese Science Bulletin 04/2012; 47(6):508-512. · 1.32 Impact Factor
ABSTRACT: This note retrieves the annual and monthly mean 0.75 μm aerosol optical depth (AOD) by using the daily direct solar radiation
and sunshine duration data of 47 solar stations from 1961 to 1990. The characteristic of AOD variation over China in recent
30 years was analyzed. The results indicate that AOD increased obviously over China from 1961 to 1990. AOD increased most
rapidly over the east part of Southwest China, the middle-and-lower reaches of the Yangtze River and the Tibetan Plateau.
The increasing trend of AOD is also relatively distinct in North China, the Shandong Peninsula, east part of Qinghai Province,
and coastal areas of Guangdong Province. However, in most parts of Northwest China and Northeast China, the increase of AOD
is less significant, while in the west part of the Xinjiang Uygur Autonomous Region and some parts of Yunnan Province, AOD
shows decreasing tendency. Generally, AOD reaches its maximum in spring and the minimum appears in summer. As to the linear
trend, the maximum occurs in spring but the minimum in winter. Among the 47 stations selected in this note, the largest three
stations of AOD are Chengdu, Chongqing and Nanchong, respectively, which all lie in the Sichuan Basin, and the smallest value
of AOD occurs in Jinghong located in Yunnan Province.
KeywordsChina-atmospheric aerosol-optical depth-yearly variation
Chinese Science Bulletin 04/2012; 45(14):1328-1334. · 1.32 Impact Factor
ABSTRACT: A fine-mesh regional meteorological model that suits the Yangtze Delta region was developed. This model was used to simulate
some micro weathers, such as the land and sea breezes, land and lake breezes and urban heat island effect, in the Yangtze
Delta successfully. The model was also used to study the characteristics and the formation mechanism of surface shear line
in the region. It is indicated that the interaction between the sea breeze and the lake breeze is the main factor for the
formation and maintenance of the surface shear line.
Science in China Series D Earth Sciences 03/2003; 46(4):405-415. · 1.59 Impact Factor
Journal of Environmental Science & Health Part A. 11/2000; A35(10):1931-1939.