Abstract
The East Asian Summer Monsoon driven by temperature and moisture gradients between the Asian continent and the Pacific Ocean, leads to approximately 50% of the annual rainfall in the region across 20-40°N. Due to its increasing scientific and social importance, there have been several previous studies on identification of moisture sources for summer monsoon rainfall over East Asia mainly using Lagrangian or Eulerian atmospheric water vapor models. The major source regions for EASM previously proposed include the North Indian Ocean, South China Sea and North western Pacific. Based on high-precision and high-frequency 6-year measurement records of hydrofluorocarbons (HFCs), here we report a direct evidence of rapid intrusion of warm and moist tropical air mass from the Southern Hemisphere (SH) reaching within a couple of days up to 33°N into East Asia. We further suggest that the combination of direct chemical tracer record and a back-trajectory model with physical meteorological variables helps pave the way to identify moisture sources for monsoon rainfall. A case study for Gosan station (33.25°N, 126.19°E) indicates that the meridional transport of precipitable water from the SH accompanying the southerly/southwesterly flow contributes most significantly to its summer rainfall.
| Original language | English (US) |
|---|---|
| Article number | 4669 |
| Journal | Scientific Reports |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 1 2018 |
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Cite this
Chemical evidence of inter-hemispheric air mass intrusion into the Northern Hemisphere mid-latitudes. / Li, S.; Park, S.; Lee, J. Y.; Ha, K. J.; Park, M. K.; Jo, C. O.; Oh, H.; Mühle, J.; Kim, K. R.; Montzka, S. A.; O'Doherty, S.; Krummel, P. B.; Atlas, Elliot L; Miller, B. R.; Moore, F.; Weiss, R. F.; Wofsy, S. C.
In: Scientific Reports, Vol. 8, No. 1, 4669, 01.12.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Chemical evidence of inter-hemispheric air mass intrusion into the Northern Hemisphere mid-latitudes
AU - Li, S.
AU - Park, S.
AU - Lee, J. Y.
AU - Ha, K. J.
AU - Park, M. K.
AU - Jo, C. O.
AU - Oh, H.
AU - Mühle, J.
AU - Kim, K. R.
AU - Montzka, S. A.
AU - O'Doherty, S.
AU - Krummel, P. B.
AU - Atlas, Elliot L
AU - Miller, B. R.
AU - Moore, F.
AU - Weiss, R. F.
AU - Wofsy, S. C.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - The East Asian Summer Monsoon driven by temperature and moisture gradients between the Asian continent and the Pacific Ocean, leads to approximately 50% of the annual rainfall in the region across 20-40°N. Due to its increasing scientific and social importance, there have been several previous studies on identification of moisture sources for summer monsoon rainfall over East Asia mainly using Lagrangian or Eulerian atmospheric water vapor models. The major source regions for EASM previously proposed include the North Indian Ocean, South China Sea and North western Pacific. Based on high-precision and high-frequency 6-year measurement records of hydrofluorocarbons (HFCs), here we report a direct evidence of rapid intrusion of warm and moist tropical air mass from the Southern Hemisphere (SH) reaching within a couple of days up to 33°N into East Asia. We further suggest that the combination of direct chemical tracer record and a back-trajectory model with physical meteorological variables helps pave the way to identify moisture sources for monsoon rainfall. A case study for Gosan station (33.25°N, 126.19°E) indicates that the meridional transport of precipitable water from the SH accompanying the southerly/southwesterly flow contributes most significantly to its summer rainfall.
AB - The East Asian Summer Monsoon driven by temperature and moisture gradients between the Asian continent and the Pacific Ocean, leads to approximately 50% of the annual rainfall in the region across 20-40°N. Due to its increasing scientific and social importance, there have been several previous studies on identification of moisture sources for summer monsoon rainfall over East Asia mainly using Lagrangian or Eulerian atmospheric water vapor models. The major source regions for EASM previously proposed include the North Indian Ocean, South China Sea and North western Pacific. Based on high-precision and high-frequency 6-year measurement records of hydrofluorocarbons (HFCs), here we report a direct evidence of rapid intrusion of warm and moist tropical air mass from the Southern Hemisphere (SH) reaching within a couple of days up to 33°N into East Asia. We further suggest that the combination of direct chemical tracer record and a back-trajectory model with physical meteorological variables helps pave the way to identify moisture sources for monsoon rainfall. A case study for Gosan station (33.25°N, 126.19°E) indicates that the meridional transport of precipitable water from the SH accompanying the southerly/southwesterly flow contributes most significantly to its summer rainfall.
UR - http://www.scopus.com/inward/record.url?scp=85044284255&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85044284255&partnerID=8YFLogxK
U2 - 10.1038/s41598-018-22266-0
DO - 10.1038/s41598-018-22266-0
M3 - Article
C2 - 29549350
AN - SCOPUS:85044284255
VL - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 4669
ER -