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STUDY OF ATMOSPHERIC WATER BALANCE OVER SOUTH ASIAN MONSOON REGION
http://hdl.handle.net/2237/13043
http://hdl.handle.net/2237/13043da0bab3b-8cda-4469-b2cd-ca29a5a126c6
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Prasanna.pdf (3.4 MB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-03-31 | |||||
| タイトル | ||||||
| タイトル | STUDY OF ATMOSPHERIC WATER BALANCE OVER SOUTH ASIAN MONSOON REGION | |||||
| 言語 | en | |||||
| 著者 |
Prasanna, Venkatraman
× Prasanna, Venkatraman |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The atmospheric water balance over different domains within the South Asian Monsoon region has been studied using moisture convergence (C) computed from JRA- 25, ERA-40 and NCEP/NCAR reanalysis datasets, GPCP precipitation data (P) and evaporation (E) as a residual of these two parameters. The seasonal climatology of P, C, and E for the selected regions shows generally large contribution of E to P. The interannual characteristics of P, C and E over selected key domains with in the South Asian Monsoon region have also been examined for both early (JJ) and late summer (AS) monsoon periods from 1979 to 2000. The spatial and temporal characteristics of the hydrological cycle and the contribution of E and C to P are discussed in detail. One important aspect on seasonal time scale is that from dry regions of Northwest to Central and to the wettest Northeast regions, the monthly variations of E or C are large during the monsoon months specific to that region. However, the interannual variability of P over each domain is not necessarily be influenced by the same criteria like C or E, which influences the mean seasonal precipitation. It is also evident that the structure of variability for early (JJ) and late (AS) summer precipitation is different over south Asian Monsoon region. Over northwest India E dominates C on seasonal time scale, but only C contribute to interannual variability of P. Similarly, over central India C dominates E during early summer (JJ) on seasonal timescale, but E contributes higher to P variability on interannual time scale and during late summer (AS) over central India E dominates C on seasonal time scale, but C contributes higher to P variability on interannual time scale. Over northeast India, C dominates E on seasonal time scale, but only E contributes to interannual variability of P. The importances of land-atmosphere interactions over each domain are discussed. The regionality in the mechanism of precipitation generation and its contribution to the all India summer monsoon precipitation variability are also discussed in detail. The role of evaporation on the interannual variability of precipitation is stronger over Bay of Bengal sector and the role of convergence on the interannual variability of precipitation is stronger over Arabian Sea sector. The interannual variability of P, C and E for the northeast monsoon season (October to December) over the south Peninsular India and Sri Lanka have also been examined. The spatial and temporal characteristics of P, C and E characteristics have proved that over this region, E principally dominates during the entire monsoon months (OND). The moisture transport from the Indian Ocean sector modulates the precipitation over this region on a year-to-year basis. It has been noted that the positive northeast monsoon rainfall is associated with El-Nino coupled with positive Indian Ocean Dipole mode, but negative northeast monsoon rainfall is weakly associated only with La-Nina condition. The role of land-atmospheric interaction over the region in modulating the interannual variability of hydrological cycle has also been discussed. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 名古屋大学博士学位論文 学位の種類:博士(理学) (課程) 学位授与年月日:平成20年3月25日 | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_db06 | |||||
| タイプ | doctoral thesis | |||||
| 書誌情報 |
発行日 2008-03-25 |
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| 学位名 | ||||||
| 言語 | ja | |||||
| 学位名 | 博士(理学) | |||||
| 学位授与機関 | ||||||
| 学位授与機関識別子Scheme | kakenhi | |||||
| 学位授与機関識別子 | 13901 | |||||
| 言語 | ja | |||||
| 学位授与機関名 | 名古屋大学 | |||||
| 言語 | en | |||||
| 学位授与機関名 | Nagoya University | |||||
| 学位授与年度 | ||||||
| 学位授与年度 | 2007 | |||||
| 学位授与年月日 | ||||||
| 学位授与年月日 | 2008-03-25 | |||||
| 学位授与番号 | ||||||
| 学位授与番号 | 甲第7824号 | |||||
| フォーマット | ||||||
| 値 | application/pdf | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/13043 | |||||
| 識別子タイプ | HDL | |||||
