DOI: 10.1002/jgrd.50684
论文题名: Tropical water vapor variations during the 2006-2007 and 2009-2010 El Niños: Satellite observation and GFDL AM2.1 simulation
作者: Takahashi H. ; Su H. ; Jiang J.H. ; Luo Z.J. ; Xie S.-P. ; Hafner J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 16 起始页码: 8910
结束页码: 8920
语种: 英语
Scopus关键词: Computer simulation
; Infrared devices
; Infrared instruments
; Oceanography
; Tropics
; Troposphere
; Atmospheric infrared sounders
; Dynamic component
; Lower troposphere
; Meridional planes
; Microwave limb sounder
; Satellite observations
; Specific humidity
; Water vapor measurement
; Water vapor
; El Nino-Southern Oscillation
; humidity
; numerical model
; satellite imagery
; tropical environment
; troposphere
; water vapor
; Pacific Ocean
; Pacific Ocean (East)
英文摘要: Water vapor measurements from Aura Microwave Limb Sounder (MLS, above 300 hPa) and Aqua Atmospheric Infrared Sounder (AIRS, below 300 hPa) are analyzed to study the variations of moisture during the 2006-2007 and 2009-2010 El Niños. The 2006-2007 El Niño is an East Pacific (EP) El Niño, while the 2009-2010 El Niño is a Central Pacific (CP) El Niño or El Niño Modoki. Results show that these two types of El Niño events produce different patterns of water vapor anomalies over the tropical ocean, approximately resembling the cloud anomalies shown in Su and Jiang (2013). Regression of water vapor anomalies onto the Niño-3.4 SST for the A-Train period shows a clear "upper tropospheric amplification" of the fractional water vapor change, i.e., the ratio of the change in specific humidity to the layer-averaged specific humidity. Furthermore, tropical water vapor anomalies in different circulation regimes are examined. It is shown that the variations of water vapor during the 2006-2007 El Niño are mainly controlled by the thermodynamic component, whereas both dynamic and thermodynamic components control the water vapor anomalies during the 2009-2010 El Niño. GFDL AM2.1 model simulations of water vapor and cloud anomalies for the two El Niños are compared with the satellite observations. In general, the model approximately reproduces the water vapor anomalies on both zonal and meridional planes but it produces too strong a cloud response in the mid- and lower troposphere. The model fails to capture the dynamic component of water vapor anomalies, particularly over the Indian Ocean. © 2013. Her Majesty the Queen in Right of Canada. American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63411
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Program in Earth and Environmental Sciences, Graduate Center, CUNY, New York, NY, United States; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, United States; Department of Earth and Atmospheric Sciences, CREST Institute, City College of New York, New York, NY, United States; Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States; International Pacific Research Center, Department of Meteorology, University of Hawaii at Manoa, Honolulu, HI, United States
Recommended Citation:
Takahashi H.,Su H.,Jiang J.H.,et al. Tropical water vapor variations during the 2006-2007 and 2009-2010 El Niños: Satellite observation and GFDL AM2.1 simulation[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(16)