UCLA名誉教授の柳井博士によるモンスーンに関するセミナーが
下記のとおり、
７月２６日〔水）１０時半から、地球フロンティアで開かれます。
また、同じ内容のセミナーが
８月３日（木）１０時半より、
筑波大学（自然系学系棟Ｂ２１５講義室）でも行われます。
アジアモンスーンに関心のある方は、ぜひご参加ください。
（安成哲三）
> IGCR Formal Seminar is scheduled as follows.
> We welcome anyone interested in the topic.
>
> ************ Formal Seminar **********************
> Speaker: Prof. Michio Yanai
> Department of Atmospheric Sciences
> University of California, Los Angels
>
> Title: Recent research on the Asian-Australian monsoon system at
UCLA
>
> Date & time: 10:30~12:00 Wed, July 26
>
> Place: IGCR seminar room
（浜松町シーバンスＮビル７Ｆ、地球フロンティアセミナー室）
>
> Abstract:
> RECENT RESEARCH ON THE ASIAN-AUSTRALIAN MONSOON SYSTEM AT UCLA
> Michio Yanai and Xiaodong Liu
> Department of Atmospheric Sciences, University of California, Los
Angeles
>
> 1. INTERANNUAL VARIABILITY OF THE ASIAN-AUSTRALIAN MONSOON SYSTEM
>
> The interannual variability of rainfall associated with the Asian
and
> Australian summer monsoons and its relationship with ENSO are
studied.
> There is a significant correlation between the annual precipitation
amount
> over southern Asia and that over northern Australia when measured in
> "monsoon years" (Yasunari 1991). The rainfall amount associated with
the
> Asian summer monsoon has a significant correlation with the rainfall
due to
> the following Australian summer monsoon, but the preceding
Australian
> monsoon rainfall has no significant correlation with the succeeding
Asian
> monsoon rainfall. An Asian- Australian monsoon index (AAI) is
proposed
> using a combination of precipitation for both southern Asia and
northern
> Australia. AAI has a high positive correlation with SOI and a high
negative
> correlation with SST anomaly in the equatorial eastern Pacific Ocean.
The
> SST anomaly in the eastern Pacific, with the seasonal displacement of
the
> Walker circulation, controls the variability of precipitation in
southern
> Asia and northern Australia. The effect of the SST anomaly of the
Indian
> Ocean on the variability of the Asian-Australian monsoon system is
also
> discussed.
>
> 2. IMPACT OF THE MONSOON RAINFALL ON GLOBAL TROPOSPHERIC TEMPERATURE
>
> Relationship between the Indian monsoon rainfall and the
tropospheric
> temperature over the globe is examined by using the correlation and
> singular value decomposition (SVD) analyses. (i) The June-September
> all-India rainfall (AIR) has a significant positive correlation with
the
> tropospheric (200-600 hPa) temperature of September and October over
the
> Eurasian continent. The highest correlation is located in western
Eurasia.
> There are also regions with positive correlation in the Southern
Hemisphere
> subtropics. (ii) The spatial structure of the first SVD mode for OLR
> anomalies shows the coherent variations in convective activity from
the
> northern tropical Africa to India. The pattern of the first SVD mode
for
> 300-hPa temperature anomalies shows a distribution nearly symmetric
with
> respect to the equator. (iii) The observed warming in the upper
troposphere
> during the anomalous summer monsoon rainfall is a result of
large-scale
> subsidence and thermal advection dynamically induced by anomalous
tropical
> heating.
>
> [See Figures posted at
<<http://www.atmos.ucla.edu/~xliu/noaafig.htm>.]
>
> Home Page: http://uniblab.atmos.ucla.edu/~yanai/
>
> Profile:
> （学歴・職歴）
> １９５６年 東京大学理学部卒業
> １９６１年 同上大学院修了 理学博士
> １９６１年 気象庁 気象研究所
> １９６５年 東京大学理学部 助教授
> １９７０年 UCLA Professor
> １９９９年 同上 retire
> （受賞）
> 日本気象学会賞、同藤原賞、
> アメリカ気象学会Jule G Charney Award受賞
> （研究歴）
> 大学院生時代、台風発生の詳細な解析を行い学位取得。博士論文が
> 日本気象学会賞になるとともに、そこで導入したQ1, Q2は大気熱
> 収支・水蒸気収支の解析手法のグローバルスタンダードとなった。
> １９６５〜７０年東京大学助教授時代、大学院生を率いて熱帯気象
> の研究を推進し、Yanai-Maruyama waveの発見をはじめ、多くの新し
> い研究で世界をリードした。１９７０年代UCLAでは積雲パラメタ
> リゼーシ?ンを観測データで検証するのをはじめ、熱帯擾乱の解析的
> 研究を推進し、８０年代以降は熱帯域の気候変動についても多くの
> 研究を行い、特にアジアモンスーンに及ぼすチベット高原の影響に
> 力を入れている。
>
-------------------------------------
安成哲三
筑波大学地球科学系
〒305-8571 つくば市天王台1-1-1
TEL: 0298-53-4399
FAX: 0298-51-9764
e-mail: yasunari@atm.geo.tsukuba.ac.jp