scholarly journals Atmospheric Circulation Patterns over East Asia and Their Connection with Summer Precipitation and Surface Air Temperature in Eastern China during 1961–2013

2018 ◽  
Vol 32 (2) ◽  
pp. 203-218 ◽  
Author(s):  
Shuping Li ◽  
Wei Hou ◽  
Guolin Feng
Keyword(s):  
East Asia ◽  
Atmospheric Circulation ◽  
Air Temperature ◽  
Eastern China ◽  
Surface Air Temperature ◽  
Summer Precipitation ◽  
Atmospheric Circulation Patterns ◽  
Circulation Patterns

scholarly journals Moisture sources and synoptic conditions of summer precipitation in the glacial zone of the East Sayan Range

2020 ◽  
Vol 17 ◽  
pp. 1-8
Author(s):  
Eduard Y. Osipov ◽  
Olga P. Osipova
Keyword(s):  
Atmospheric Circulation ◽  
Northern Hemisphere ◽  
Summer Precipitation ◽  
Reanalysis Data ◽  
High Mountain ◽  
Atmospheric Circulation Patterns ◽  
Circulation Patterns ◽  
Precipitation Record ◽  
Macro Scale ◽  
Synoptic Conditions

Abstract. Precipitation in high-mountain regions is characterized by a strong heterogeneity due to complex interaction between atmospheric circulation and steep topography, however, extremely rare network of high elevation stations hampers the adequate high resolution regional climate modeling. In this study we present new data of precipitation directly measured in high-mountain catchment, on the continental glacier (East Sayan Range, south of East Siberia) during the summer periods of 2015–2017 using automatic weather station. The precipitation record was compared with near located weather stations and ERA Interim and NCEP/NCAR reanalysis data. Precipitation mode similar to the glacier site was found at the stations located west and northwest, while ERA Interim and NCEP/NCAR reanalysis data underestimated the precipitation by 40 % and 70 %, respectively. Atmospheric circulation patterns in days with precipitation were analyzed by using mean sea level pressure, geopotential height at 700 and 500 hPa and classification of macro scale atmospheric processes of the Northern Hemisphere by Dzerdzeevskii. Summer precipitation was mostly associated with meridional southern group of large scale circulation the Northern Hemisphere, while at synoptic scale it basically fell in cyclonic (49 % of precipitation) and low-gradient cyclonic (30 %) baric fields. Six typical atmospheric circulation patterns over the East Sayan were identified for days with precipitation. The sources and atmospheric moisture transfer to the glacier was defined by using the HYSPLIT trajectory model. The most of summer precipitation (70 %) was related with western cyclones, while about 25 % of rainfalls (mainly of moderate to strong intensity) was originated from the south-east (Pacific monsoon influence).

scholarly journals The East Asian summer monsoon at mid-Holocene: results from PMIP3 simulations

2012 ◽  
Vol 8 (4) ◽  
pp. 3251-3276 ◽  
Author(s):  
W. Zheng ◽  
B. Wu ◽  
J. He ◽  
Y. Yu
Keyword(s):  
Air Temperature ◽  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Eastern China ◽  
Surface Air Temperature ◽  
Summer Precipitation ◽  
Asian Summer ◽  
Yangzi River

Abstract. Ten Coupled General Circulation Models (CGCMs) participating the third phase of Paleoclimate Modeling Intercomparison project (PMIP3) are assessed for the simulations of East Asian Summer Monsoon (EASM) at both the present climate and mid-Holocene. Results show that the PMIP3 model median well captures the characteristics of the EASM, including the two distinct features of the Meiyu Front and the stepwise meridional displacement of the monsoon rainbelt. At mid-Holocene, the enhanced EASM is simulated by the PMIP3 models. The model median shows that the changes of surface air temperature and precipitation are within the range as indicated by the proxy data over the eastern China. Both the changes of monsoonal circulation and the water vapor content favor the increasing of summer precipitation. Regional features can be identified between models because of their different simulations of the above changes. The model spread for the surface air temperature (TAS) is relatively smaller when compared with that of PMIP2 models in both the Northern Hemisphere and the eastern China. However, the model spread of summer precipitation is larger among PMIP3 models, particularly in the lower reaches of Yangzi River. The TAS over Tibetan Plateau has a positive relationship with the precipitation in the lower reaches of Yangzi River, yet this relationship does not apply for those PMIP3 models in which the monsoonal precipitation is more sensitive to the changes of large-scale circulation.

scholarly journals Spatio-temporal variability of precipitation over the Western Balkan countries and its links with the atmospheric circulation patterns

2021 ◽  
Vol 71 (1) ◽  
pp. 29-42
Author(s):  
Dragan Milosevic ◽  
Rastislav Stojsavljevic ◽  
Szilárd Szabó ◽  
Ugljesa Stankov ◽  
Stevan Savic ◽  
...  
Keyword(s):  
Atmospheric Circulation ◽  
Bosnia And Herzegovina ◽  
Summer Precipitation ◽  
The Arctic ◽  
Annual Precipitation ◽  
Atmospheric Circulation Patterns ◽  
Circulation Patterns ◽  
Precipitation Decrease ◽  
Precipitation Increase ◽  
Mediterranean Oscillation

Temporal and spatial variability of annual and seasonal precipitation from 71 stations located in Western Balkan (WB) countries (Serbia, Bosnia and Herzegovina, and Montenegro) and their correlations with nine atmospheric circulation patterns was examined for the period 1950-2016. Annual precipitation increased significantly throughout the WB (from 2% to 8% per decade) on 20% of stations located mainly in the mountainous western Serbia and eastern Bosnia and Herzegovina. Winter was characterized by non?significant precipitation changes in most of the studied area, with only a few stations characterized by significant precipitation increase (up to 12% per decade) in the mountainous area of WB, and a few stations characterized by significant decrease (up to -6% per decade) in the Pannonian plain. Significant precipitation increase was noticed on 15% of the stations in spring, while it was noticed on 17% of the stations in autumn. Summer precipitation decreased significantly (up to -5% per decade) on a limited area of northern Serbia (6% of the stations), while the majority of stations showed non?significant increase. The strongest influences on annual precipitation in WB region are of the Arctic Oscillation (AO) and Mediterranean Oscillation (MO), leading to the precipitation decrease during their positive phases. Winter precipitation is significantly negatively correlated with AO, East Atlantic/Western Russia oscillation (EA/WR), and North Atlantic Oscillation (NAO) and has a significant positive correlation with Western Mediterranean Oscillation (WeMO) on the majority of stations. MO has the strongest influence on summer precipitation in WB region leading to precipitation decrease, while AO has the dominant influence on precipitation in the region during autumn.

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