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Understanding the Relationship betwe...

Li, Siyu.

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Understanding the Relationship between Winter Hawaii Precipitation and North Pacific Climate Variability for Past and Present Climate Conditions.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Understanding the Relationship between Winter Hawaii Precipitation and North Pacific Climate Variability for Past and Present Climate Conditions./
作者:	Li, Siyu.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	54 p.
附註:	Source: Masters Abstracts International, Volume: 58-01.
Contained By:	Masters Abstracts International58-01(E).
標題:	Atmospheric sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10681522
ISBN:	9780438274020

Understanding the Relationship between Winter Hawaii Precipitation and North Pacific Climate Variability for Past and Present Climate Conditions.
Li, Siyu.

Understanding the Relationship between Winter Hawaii Precipitation and North Pacific Climate Variability for Past and Present Climate Conditions. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 54 p.

Source: Masters Abstracts International, Volume: 58-01.

Thesis (M.S.)--State University of New York at Albany, 2018.

Kona lows (KLs) are a type of seasonal cut-off cyclones in the North Pacific around the Hawaiian Islands during the cold season month (Oct.--Apr.). KLs are important for the annual rainfall budget of the Hawaiian Islands. This study investigates what controls the winter precipitation variability over the Hawaiian Islands in the present-day climate and within a long-term paleoclimate simulation. ERA-interim data from 1979--2014 are used for the present-day analysis of the large-scale circulation. The potential vorticity is used as a measure of extratropical synoptic activity. The Hawaii Rainfall Index is from the Rainfall Atlas of Hawaii (seasonal means, 1920--2012). For the paleoclimatic study, the Transient Climate of the Last 21,000 Years (TraCE-21ka) simulation is used for the zonal wind--Hawaii rainfall analysis.

ISBN: 9780438274020Subjects--Topical Terms:

3168354
Atmospheric sciences.

Understanding the Relationship between Winter Hawaii Precipitation and North Pacific Climate Variability for Past and Present Climate Conditions.
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500 $a Adviser: Oliver Elison Timm.
502 $a Thesis (M.S.)--State University of New York at Albany, 2018.
520 $a Kona lows (KLs) are a type of seasonal cut-off cyclones in the North Pacific around the Hawaiian Islands during the cold season month (Oct.--Apr.). KLs are important for the annual rainfall budget of the Hawaiian Islands. This study investigates what controls the winter precipitation variability over the Hawaiian Islands in the present-day climate and within a long-term paleoclimate simulation. ERA-interim data from 1979--2014 are used for the present-day analysis of the large-scale circulation. The potential vorticity is used as a measure of extratropical synoptic activity. The Hawaii Rainfall Index is from the Rainfall Atlas of Hawaii (seasonal means, 1920--2012). For the paleoclimatic study, the Transient Climate of the Last 21,000 Years (TraCE-21ka) simulation is used for the zonal wind--Hawaii rainfall analysis.
520 $a The goal of the present-day analysis is to understand how the Hawaiian interannual rainfall variability can be explained by the variability in the large-scale circulation, and regionally by the frequency of Kona Lows. The results show that large-scale North Pacific climate variability, such as El Nino--Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO), have influence on the rainfall in Hawaii. It is found that the Asian westerly jet provides the key link in this process. When the jet extends farther into the eastern Pacific sector the Kona Low activity is reduced and less winter rainfall is observed over Hawaii.
520 $a The goal of the paleoclimatic study is to understand the precipitation time series from 22ka BP (before present, traditionally defined year relative to 1950) to present and if there was any relationship between precipitation and zonal wind field in TraCE-21ka simulation. The jet position-rainfall relationship was investigated within the TrACE-21 simulation. For the TraCE-21ka dataset, there is an increasing rainfall trend from 21kBP to 14kBP; this period coincides with a gradual decrease in the strength of the westerly wind jet. The results show that the westerly jet strength has a strong influence on the Kona Low activity and the rainfall over Hawaii both in the present and the past.
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