scholarly journals The simulation of water vapor transport in East Asia using a regional air-sea coupled model

2013 ◽  
Vol 118 (4) ◽  
pp. 1585-1600 ◽  
Author(s):  
Suxiang Yao ◽  
Qian Huang ◽  
Yaocun Zhang ◽  
Xu Zhou
Keyword(s):  
Water Vapor ◽  
East Asia ◽  
Coupled Model ◽  
Vapor Transport ◽  
Water Vapor Transport

scholarly journals Water Vapor Transport Related to the Interdecadal Shift of Summer Precipitation over Northern East Asia in the Late 1990s

2018 ◽  
Vol 32 (5) ◽  
pp. 781-793 ◽  
Author(s):  
Po Hu ◽  
Minghao Wang ◽  
Liu Yang ◽  
Xiaojuan Wang ◽  
Guolin Feng
Keyword(s):  
Water Vapor ◽  
East Asia ◽  
Summer Precipitation ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Interdecadal Shift

Interdecadal Variation of the Relationship between East Asian Water Vapor Transport and Tropical Pacific Sea Surface Temperatures during January and Associated Mechanisms

2019 ◽  
Vol 32 (21) ◽  
pp. 7575-7594 ◽  
Author(s):  
Bo Sun ◽  
Huijun Wang ◽  
Botao Zhou
Keyword(s):  
Water Vapor ◽  
East Asia ◽  
East Asian ◽  
Tropical Pacific ◽  
Vapor Transport ◽  
Sea Surface ◽  
Water Vapor Transport ◽  
The Relationship ◽  
Asian Water ◽  
Sst Anomalies

Abstract This study examined the interdecadal variations in the relationship between the East Asian water vapor transport (WVT) and the central and eastern tropical Pacific (CETP) sea surface temperatures (SSTs) in January during 1951–2018, focusing on the meridional WVT over East Asia, which is critical for the East Asian winter precipitation. The results indicate that before the 1980s, an increased southerly WVT over East Asia was generally associated with warm SST anomalies in the CETP during January, whereas, after the mid-1980s, an increased southerly WVT over East Asia was mostly associated with cold SST anomalies in the central tropical Pacific during January. The underlying mechanisms are discussed based on a comparison on the climate anomalies associated with the East Asian meridional WVT between the periods of 1951–79 and 1986–2018. During 1951–79, the meridional WVT over East Asia was mainly modulated by the Pacific–East Asian (PEA) teleconnection, which would induce an anomalous southerly WVT over East Asia corresponding to warm SST anomalies in the CETP. Whereas, during 1986–2018, the connection between the PEA teleconnection and the East Asian meridional WVT was weakened. The connection among the CETP SSTs, the anomalous zonal circulation over the North Pacific, and the East Asian meridional WVT was enhanced. Additionally, the connection among the CETP SSTs, the circumglobal teleconnection in the Northern Hemisphere, and the East Asian meridional WVT was enhanced. The above two enhanced connections opposed the effect of the PEA teleconnection and would induce an anomalous southerly WVT over East Asia corresponding to cold SST anomalies in the central tropical Pacific.

scholarly journals Proof in climatology for circulation effect of stalagmite δ<sup>18</sup>O in East Asia: analysis on the ratios among water vapor transport passageway intensities in East Asia

2013 ◽  
Vol 9 (4) ◽  
pp. 4263-4291
Author(s):  
S. Nan ◽  
M. Tan ◽  
P. Zhao
Keyword(s):  
Water Vapor ◽  
Indian Ocean ◽  
East Asia ◽  
North Pacific ◽  
El Nino ◽  
East Asian ◽  
Tropical Indian Ocean ◽  
Vapor Transport ◽  
Eastern Pacific ◽  
Water Vapor Transport

Abstract. Further verification about the circulation effect of stalagmite δ18O in East Asian monsoon region needs the quantitative description for the proportion of water vapor transport (WVT) from different source regions. WVT passageway intensities are defined as regionally averaged WVT flux modes in this paper. The ratio between two WVT passageways' intensities represents relative intensity of the two WVT passageways. Using the NCEP-NCAR reanalysis data for 1948–2011, the ratios of the intensities of three WVT passageways from low latitudes (the intensity of WVT from Bay of Bengal (IBOB), the intensity of WVT from South China Sea (ISCS) and the intensity of WVT from western North Pacific (IWNP) in summer are calculated. SB is for the ISCS-IBOB ratio, WB for the IWNP-IBOB ratio, and WS for the IWNP-ISCS ratio. The decadal increase occurs in the time series of WB and WS, with higher values in 1976–1995 and lower values in 1950–1975, probably resulting from the strengthening of WVT from WNP in the midterm of 1970s. East Asian atmospheric circulations, WVTs and previous SST characters corresponding to the ratios are analyzed. The result indicates that SB, WB and WS may properly reflect the relative intensities between ISCS and IBOB, between IWNP and IBOB, and between IWNP and ISCS, respectively. For high SB years, the Asian Low and the western Pacific subtropical high (WPSH) weaken. The southwesterly winds from BOB to the Yangtze River valley by the southeast of the Tibetan Plateau weaken and the WVT from BOB to East Asia weakens. The southwesterly winds from SCS to East Asia strengthen and the WVT from SCS to East Asia strengthens. In high WB years, the Asian Low weakens and the WPSH shifts westwards, enhances and enlarges. The WVT from WNP to East Asia increases because of the strengthening of the easterly winds on the south of the WPSH. The westerly winds from BOB to East Asia by Indo-China Peninsula decrease and the WVT from BOB to East Asia weakens. The atmospheric circulation and WVT associated with WS are similar with those associated with WB. There are close relationships between WB (and WS) and the WPSH area, position and intensity. In high WB (and WS) years, the WPSH shifts westwards, enlarges and enhances. There is no obvious anomalous previous SST signal in tropical Indian Ocean and equatorial central and eastern Pacific for anomalous SB years. WB and WS are closely related to previous SST signal. When the equatorial central and eastern Pacific is in El Niño phase, SST in the tropical Indian Ocean, BOB and SCS is high and SST at middle latitudes in North Pacific is low, WB and WS tend to be high. After the midterm of 1970s, the equatorial central and eastern Pacific is often in El Niño phase. It is in agreement with higher WB in 1976–1995 than that in 1950–1975. In light of circulation effect of stalagmite δ18O in East Asia, high WB implies high stalagmite δ18O. Therefore, the interdecadal increase of WB in 1976–1995 than in 1950–1975 provides the proof using the conception of circulation effect to explain the interdecadal change of stalagmite δ18O at most regions in East Asia.

scholarly journals Extreme Floods in the Eastern Part of Europe: Large-Scale Drivers and Associated Impacts

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1122
Author(s):  
Monica Ionita ◽  
Viorica Nagavciuc
Keyword(s):  
Water Vapor ◽  
Heavy Rainfall ◽  
Large Scale ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Flood Events ◽  
Rainfall Events ◽  
Catchment Areas ◽  
Large Scale Atmospheric Circulation ◽  
Heavy Rainfall Events

The role of the large-scale atmospheric circulation in producing heavy rainfall events and floods in the eastern part of Europe, with a special focus on the Siret and Prut catchment areas (Romania), is analyzed in this study. Moreover, a detailed analysis of the socio-economic impacts of the most extreme flood events (e.g., July 2008, June–July 2010, and June 2020) is given. Analysis of the largest flood events indicates that the flood peaks have been preceded up to 6 days in advance by intrusions of high Potential Vorticity (PV) anomalies toward the southeastern part of Europe, persistent cut-off lows over the analyzed region, and increased water vapor transport over the catchment areas of Siret and Prut Rivers. The vertically integrated water vapor transport prior to the flood peak exceeds 300 kg m−1 s−1, leading to heavy rainfall events. We also show that the implementation of the Flood Management Plan in Romania had positive results during the 2020 flood event compared with the other flood events, when the authorities took several precaution measurements that mitigated in a better way the socio-economic impact and risks of the flood event. The results presented in this study offer new insights regarding the importance of large-scale atmospheric circulation and water vapor transport as drivers of extreme flooding in the eastern part of Europe and could lead to a better flood forecast and flood risk management.

Inversion of Evaporation and Water Vapor Transport Using HY-2 Multi-Sensor Data

2020 ◽  
Vol 19 (1) ◽  
pp. 13-22
Author(s):  
Dong’ang Liu ◽  
Jian Sun ◽  
Changlong Guan
Keyword(s):  
Water Vapor ◽  
Vapor Transport ◽  
Sensor Data ◽  
Water Vapor Transport
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