Characteristics of global precipitable water in ENSO events revealed by COSMIC measurements

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Title:	Characteristics of global precipitable water in ENSO events revealed by COSMIC measurements
Authors:	黃清勇;Teng, Wen-Hsin;Huang, Ching-Yuang;Ho, Shu-Peng;Kuo, Ying-Hwa;Zhou, Xin-Jia
Contributors:	地球科學學院大氣科學學系
Keywords:	Anomalies;Correlation;COSMIC;Earth, ocean, space;El Nino;ENSO;Exact sciences and technology;External geophysics;Geophysics;Global Positioning System;Global positioning systems;GPS;Ionosphere;La Nina;Marine;Meteorology;Microwaves;precipitable water;Retrieval;Southern Oscillation;Tropical environments
Date:	2013-08-16
Issue Date:	2026-04-21 13:40:43 (UTC+8)
Publisher:	Wiley-Blackwell;Hoboken, NJ: Blackwell Publishing Ltd
Abstract:	摘要： Precipitable water (PW) retrievals from FORMOSAT‐3/Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) Global Positioning System (GPS) radio occultation (RO) measurements were analyzed and compared with those derived from Special Sensor Microwave/Imager (SSM/I) and Advanced Microwave Scanning Radiometer for Earth Observation System (AMSR‐E) during the El Niño‐Southern Oscillation (ENSO) events from 2007 to 2011. For the three ENSO events in 2007–2011, monthly mean binned COSMIC PW results are in a very high correlation (up to 0.98) with those of SSM/I and AMSR‐E over the ocean, generally with root‐mean‐square differences less than 4 mm. PW retrievals from the three satellites are also of similar latitudinal variations. However, the PW is slightly underestimated by GPS RO, in particular, in the tropical regions. This underestimate may be caused partially by the fact that not all RO measurements can reach the surface. Inter‐satellite PW anomaly comparisons for the winter months in the ENSO events, with respect to those during the neutral (non‐ENSO) months, show consistent ENSO signals with major PW anomaly near the central Pacific in the warm event and near the Indonesian region and east of Australia in the two cold events. However, the 2007/2008 La Niña is somewhat less correlated for COSMIC with AMSR‐E and SSM/I. For the stronger 2010/2011 La Niña, their PW anomalies are in higher correlations of about 0.8. 其他題名： J. Geophys. Res. Atmos 出版者： Hoboken, NJ: Blackwell Publishing Ltd 出版日期： 2013-08-16 出處： Journal of Geophysical Research: Atmospheres, 2013-08, Vol.118 (15), p.8411-8425 資源來源： Wiley Online Library journals 版權： 2013. American Geophysical Union. All Rights Reserved. 版權： 2014 INIST-CNRS 識別號： ISSN: 2169-897X 識別號： EISSN: 2169-8996 識別號： DOI: 10.1002/jgrd.50371
Appears in Collections:	[Department of Atmospheric Sciences] journal & Dissertation

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