Effects of ENSO on Autumn Rainfall in Central Vietnam
28 years (1980–2007) of station and gridded reanalysis data were used to investigate the effects of El Niño/Southern Oscillation (ENSO) on autumn rainfall in the Extended Central Vietnam (ECV) region. Results show that, under El Niño conditions, autumn rainfall in Central Vietnam is reduced by about...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2015/264373 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832565545837264896 |
|---|---|
| author | Thang Van Vu Hieu Trong Nguyen Thang Van Nguyen Hiep Van Nguyen Huong Thi Thanh Pham Lan Thi Nguyen |
| author_facet | Thang Van Vu Hieu Trong Nguyen Thang Van Nguyen Hiep Van Nguyen Huong Thi Thanh Pham Lan Thi Nguyen |
| author_sort | Thang Van Vu |
| collection | DOAJ |
| description | 28 years (1980–2007) of station and gridded reanalysis data were used to investigate the effects of El Niño/Southern Oscillation (ENSO) on autumn rainfall in the Extended Central Vietnam (ECV) region. Results show that, under El Niño conditions, autumn rainfall in Central Vietnam is reduced by about 10 to 30%. This reduction seems to be caused by a weakening of the North East monsoon circulation, which appears to be linked to an anomalous anticyclonic vortex and a positive sea level pressure anomaly over the East Sea. In addition, the disappearance of a secondary moisture source over the southern region of the East Sea also favors the reduction in rainfall over this region. Conversely, during La Niña, the total autumn rainfall in the ECV region increases by about 9 to 19%. The strengthening of the North East monsoon, with a cyclonic wind anomaly over the East Sea, helps to increase the moisture supply to the area by about 10 to 20%, resulting in enhanced rainfall in the ECV. It is also found that the La Niña conditions do not only cause an increase in rainfall, but also change the temporal distribution of the monthly rainfall over the region, with more rainfall in the latter months of the year. |
| format | Article |
| id | doaj-art-ec242db9014f4bd2982ae945e128de7a |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-ec242db9014f4bd2982ae945e128de7a2025-02-03T01:07:30ZengWileyAdvances in Meteorology1687-93091687-93172015-01-01201510.1155/2015/264373264373Effects of ENSO on Autumn Rainfall in Central VietnamThang Van Vu0Hieu Trong Nguyen1Thang Van Nguyen2Hiep Van Nguyen3Huong Thi Thanh Pham4Lan Thi Nguyen5Vietnam Institute of Meteorology Hydrology and Climate Change (IMHEN), 23/62 Nguyen Chi Thanh, Dong Da, Hanoi, VietnamCenter for Meteorology, Hydrology and Environment Science and Technology, 291/42/48 Lac Long Quan, Hanoi, VietnamVietnam Institute of Meteorology Hydrology and Climate Change (IMHEN), 23/62 Nguyen Chi Thanh, Dong Da, Hanoi, VietnamVietnam Institute of Meteorology Hydrology and Climate Change (IMHEN), 23/62 Nguyen Chi Thanh, Dong Da, Hanoi, VietnamVietnam Institute of Meteorology Hydrology and Climate Change (IMHEN), 23/62 Nguyen Chi Thanh, Dong Da, Hanoi, VietnamVietnam Institute of Meteorology Hydrology and Climate Change (IMHEN), 23/62 Nguyen Chi Thanh, Dong Da, Hanoi, Vietnam28 years (1980–2007) of station and gridded reanalysis data were used to investigate the effects of El Niño/Southern Oscillation (ENSO) on autumn rainfall in the Extended Central Vietnam (ECV) region. Results show that, under El Niño conditions, autumn rainfall in Central Vietnam is reduced by about 10 to 30%. This reduction seems to be caused by a weakening of the North East monsoon circulation, which appears to be linked to an anomalous anticyclonic vortex and a positive sea level pressure anomaly over the East Sea. In addition, the disappearance of a secondary moisture source over the southern region of the East Sea also favors the reduction in rainfall over this region. Conversely, during La Niña, the total autumn rainfall in the ECV region increases by about 9 to 19%. The strengthening of the North East monsoon, with a cyclonic wind anomaly over the East Sea, helps to increase the moisture supply to the area by about 10 to 20%, resulting in enhanced rainfall in the ECV. It is also found that the La Niña conditions do not only cause an increase in rainfall, but also change the temporal distribution of the monthly rainfall over the region, with more rainfall in the latter months of the year.http://dx.doi.org/10.1155/2015/264373 |
| spellingShingle | Thang Van Vu Hieu Trong Nguyen Thang Van Nguyen Hiep Van Nguyen Huong Thi Thanh Pham Lan Thi Nguyen Effects of ENSO on Autumn Rainfall in Central Vietnam Advances in Meteorology |
| title | Effects of ENSO on Autumn Rainfall in Central Vietnam |
| title_full | Effects of ENSO on Autumn Rainfall in Central Vietnam |
| title_fullStr | Effects of ENSO on Autumn Rainfall in Central Vietnam |
| title_full_unstemmed | Effects of ENSO on Autumn Rainfall in Central Vietnam |
| title_short | Effects of ENSO on Autumn Rainfall in Central Vietnam |
| title_sort | effects of enso on autumn rainfall in central vietnam |
| url | http://dx.doi.org/10.1155/2015/264373 |
| work_keys_str_mv | AT thangvanvu effectsofensoonautumnrainfallincentralvietnam AT hieutrongnguyen effectsofensoonautumnrainfallincentralvietnam AT thangvannguyen effectsofensoonautumnrainfallincentralvietnam AT hiepvannguyen effectsofensoonautumnrainfallincentralvietnam AT huongthithanhpham effectsofensoonautumnrainfallincentralvietnam AT lanthinguyen effectsofensoonautumnrainfallincentralvietnam |