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DTSTART;TZID=America/New_York:20180829T080000
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SUMMARY:Winter and Summer Intraseasonal Variability in Indo-Pacific Warm Pool since 2016
DESCRIPTION:This event has passed. See the seminar recording here:\n\n \n\nProf. Chung-Hsiung Sui\nNational Taiwan University\nWednesday August 29, 2018, 12:00-1:00 PM\nESSIC Conference Room 4102, 5825 University Research Ct, College Park, MD 20740\n\nAbstract:\nWe have carried out South China Sea Two-Island Monsoon Experiments (SCSTIMX) as part of the integrated project “Interaction of convection over the Maritime Continent – SCS with large-scale flow” in coordination with the international project “Years of the Maritime Continent” (YMC). Special observations are collected in winter (SCSTIMX-W: Dec. 2017) and summer (SCSTIMX-S: May-June, 2018) at Taiping Island and Dongsha Island. Two special experiments are performed in Dec. 2016 (SCSTIMX pilot) and March 2017 (SCSTIMX aerosol) in Dongsha Island. Encompassing all field experiments during the period of Dec. 2016-June 2018, data are collected regularly at Donsha by surface weather station, wind profiler, radiometer, and upper-air balloon sounding. During the IOP of SCSTIMX experiments, intensive observations by upper-air sounding (2-4 times a day), wind profilers, passive microwave radiometer, and ceilometers are made at Taiping and Dongsha. A buoy is deployed near Taiping Island along with existing buoys in the SCS (Dongsha, SEATS), and RV-1 provide in-situ measurements for air-sea interaction studies (Lin et al. 2016). The collected SCSTIMX observations are used by six sub-projects to carry out various scientific research. \nThis project aims to investigate two major themes. We have completed an analysis of the tropical-extratropical influences on rainfall variability in South China Sea and Maritime Continent in December 2016 (Hsu et al. 2018). The second theme is the evolution of intraseasonal oscillations (ISO) over the SCS-MC, and the associated processes. We performed a study of the evolution processes for propagating intraseasonal oscillations [the MJO in winter] with strong magnitude over Indian Ocean (IO) and Maritime Continent (MC) through a diagnosis of ECMWF Re-analysis in November-April, 1982-2011 (Hung and Sui 2018).\n\nIn this report, the extended weather and intraseasonal oscillations of the 2018 Meiyu season is analyzed. We find that extended weather and ISO of the 2018 Meiyu season is influenced by the anomalous cooling in central equatorial Pacific associated with the La Nina phase of the Indo-Pacific climate oscillation. An ISO emerges on western IO in early April and propagates to western IO and dissipates in late April. IO is in dry phase in early May and a new SCC develops over western IO in mid-May and evolves into a boreal summer ISO that coincides with the onset of SCS monsoon in early June. The La Nina cooling and the intraseasonal air-sea interaction together sustain the anomalous anticyclonic circulation and prevent the development of SW monsoon until early June.\nBio-sketch:\nDr. Sui has been deeply fascinated in the fluid dynamics since his undergraduate study at National Taiwan University. He received his PhD degree in 1984 at UCLA studying convection and tropical waves. From 1984 to 2001, he worked at the University of Maryland and NASA/Goddard Space Flight Center studying clouds and tropical climate using satellite data, global model, and cloud resolving model. In 2001, he left GSFC to join the Graduate Institute of Hydrological and Oceanic Sciences at National Central University, and then in 2010 returned to his alma mater. Currently he is a distinguished professor at the Department of Atmospheric Sciences, National Taiwan University. He has published over 80 refereed papers in international journals. \nHis research group is currently working on two research topics. One is about dynamics of tropical waves and climate oscillations including MJO, ENSO, and Pacific decadal variability. The other is to analyze and simulate cloud/rain and associated hydrologic processes in East Asia and neighboring warm oceans in response to natural and anthropogenic climate changes. The central theme in both topics concerns the role of water cycle in tropical climate which is one of the most challenging areas of atmospheric science. It’s also the key to improve prediction of Monsoon disturbances and tropical cyclones.\nHost: \nDr. William Lau, wkmlau@umd.edu ( mailto:wkmlau@umd.edu ), ESSIC\nWebex info: \nEvent number: 735 903 081\nEvent password: essic\n——————————————————-\nTo join the online event\n——————————————————-\n1. Click here to join the online event.\nOr copy and paste the following link to a browser: \nhttps://umd.webex.com/umd/onstage/g.php?MTID=e2c8edcf9add764726af810618dd45e64\n2. Click “Join Now”.\n——————————————————-\nTo join the audio conference only\n——————————————————-\nUS Toll: +1-415-655-0002\nGlobal call-in numbers: https://umd.webex.com/umd/globalcallin.php?serviceType=EC&ED=666425772&tollFree=0\nAccess code: 735 903 081\n——————————————————-\nFor IT assistance\n——————————————————-\nContact Travis Swaim at: tswaim1@umd.edu\nFollow ESSIC:\nESSIC homepage: http://essic.umd.edu/\nESSIC seminar calendar: MSQ-4102; http://go.umd.edu/essicseminar\nESSIC twitter: http://twitter.com/ESSICUMD\nESSIC facebook: http://facebook.com/ESSICUMD\nESSIC seminar coordinator: Dr. John Yang, jxyang@umd.edu\n
URL:https://essic.umd.edu/events/winter-and-summer-intraseasonal-variability-in-indo-pacific-warm-pool-since-2016/
CATEGORIES:Fall 2018
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