A diagnostic study of extreme precipitation over Kerala during August 2018

被引：45

作者：

Viswanadhapalli, Yesubabu ^{[1
]}

Srinivas, Challa Venkata ^{[2
]}

Basha, Ghouse ^{[1
]}

Dasari, Hari Prasad ^{[3
]}

Langodan, Sabique ^{[3
]}

Ratnam, Madineni Venkat ^{[1
]}

Hoteit, Ibrahim ^{[3
]}

机构：

[1] Natl Atmospher Res Lab, Weather & Climate Res Grp, Gadanki, India

[2] Indira Gandhi Ctr Atom Res, Radiol Impact Assessment Sect, Kalpakkam, Tamil Nadu, India

[3] King Abdullah Univ Sci & Technol, Phys Sci & Engn Div, Thuwal 239556900, Saudi Arabia

来源：

ATMOSPHERIC SCIENCE LETTERS | 2019年 / 20卷 / 12期

关键词：

Heavy rainfall events; Southwest Indian Monsoon; Off-shore trough; Monsoon depression; INDIAN-SUMMER MONSOON; HEAVY RAINFALL EVENT; 26; JULY; 2005; RED-SEA; WRF SENSITIVITY; SIMULATION; RESOLUTION; MUMBAI; CLIMATOLOGY; MOISTURE;

D O I：

10.1002/asl.941

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The state of Kerala, located on the west coast of India, experienced a record 100-year flood that resulted in major landslides from unprecedented prolonged and extremely heavy rainfall (50-480 mm center dot day(-1)) during August 1-19, 2018, causing extensive damage and about 500 causalities. Rainfall observations indicate that the heavy rainfall occurred over two spells (August 7-10 and 14-18) in association with an offshore trough, and a depression over the Bay of Bengal (BOB). High-resolution 38-year climatology data (5 km) and the ERA-Interim reanalysis dataset show a strong low-level jet over the Arabian Sea and a depression over the BOB with a southwestward tilt during the heavy rainfall. Very high-resolution (2-km) mesoscale model simulations suggest that this high convective instability due to the strong westerly jet along with the formation of offshore vortex, the transport of mid-tropospheric moisture under the presence of conducive vertical shear of horizontal wind, and transport of mid-tropospheric moisture from the BOB are the major factors (as shown in the schematic diagram) behind the extreme heavy rainfall over Kerala.

引用

页数：10

共 41 条

[1] [Anonymous], NCARTN475STR113
[2] [Anonymous], 2018, KER FLOODS AUG 2018
[3] Assessment of Land Surface Models in a High-Resolution Atmospheric Model during Indian Summer Monsoon
Attada, Raju
Kumar, Prashant
Dasari, Hari Prasad
[J]. PURE AND APPLIED GEOPHYSICS, 2018, 175 (10) : 3671 - 3696
[4] Bindu H.H., 2018, J ATMOSPHERIC SOLAR, V182, P119
[5] Bohra AK, 2006, CURR SCI INDIA, V90, P1188
[6] Transport of atmospheric moisture during three extreme rainfall events over the Mackenzie River basin
Brimelow, JC
Reuter, GW
[J]. JOURNAL OF HYDROMETEOROLOGY, 2005, 6 (04) : 423 - 440
[7] High-resolution assessment of solar energy resources over the Arabian Peninsula
Dasari, Hari Prasad
Desamsetti, Srinivas
Langodan, Sabique
Attada, Raju
Kunchala, Ravi Kumar
Viswanadhapalli, Yesubabu
Knio, Omar
Hoteit, Ibrahim
[J]. APPLIED ENERGY, 2019, 248 : 354 - 371
[8] On the movement of tropical cyclone LEHAR
Dasari H.P.
Brahmananda Rao V.
Ramakrishna S.S.V.S.
Gunta P.
Nanaji Rao N.
Ramesh Kumar P.
[J]. Earth Systems and Environment, 2017, 1 (2)
[9] The ERA-Interim reanalysis: configuration and performance of the data assimilation system
Dee, D. P.
Uppala, S. M.
Simmons, A. J.
Berrisford, P.
Poli, P.
Kobayashi, S.
Andrae, U.
Balmaseda, M. A.
Balsamo, G.
Bauer, P.
Bechtold, P.
Beljaars, A. C. M.
van de Berg, L.
Bidlot, J.
Bormann, N.
Delsol, C.
Dragani, R.
Fuentes, M.
Geer, A. J.
Haimberger, L.
Healy, S. B.
Hersbach, H.
Holm, E. V.
Isaksen, L.
Kallberg, P.
Koehler, M.
Matricardi, M.
McNally, A. P.
Monge-Sanz, B. M.
Morcrette, J. -J.
Park, B. -K.
Peubey, C.
de Rosnay, P.
Tavolato, C.
Thepaut, J. -N.
Vitart, F.
[J]. QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2011, 137 (656) : 553 - 597
[10] Intense rainfall events over the west coast of India
Francis, P. A.
Gadgil, Sulochana
[J]. METEOROLOGY AND ATMOSPHERIC PHYSICS, 2006, 94 (1-4) : 27 - 42

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