scholarly journals Significance of Mesoscale Warm Core Eddy on Marine and Coastal Environment of the Bay of Bengal

2020 ◽  
Author(s):  
Nanda Kishore Reddy Busireddy ◽  
Kumar Ankur ◽  
Krishna Kishore Osuri
Keyword(s):  
Bay Of Bengal ◽  
Coastal Environment ◽  
Warm Core

scholarly journals Improved Prediction of Bay of Bengal Tropical Cyclones through Assimilation of Doppler Weather Radar Observations

2015 ◽  
Vol 143 (11) ◽  
pp. 4533-4560 ◽  
Author(s):  
Krishna K. Osuri ◽  
U. C. Mohanty ◽  
A. Routray ◽  
Dev Niyogi
Keyword(s):  
Bay Of Bengal ◽  
Inner Core ◽  
Weather Radar ◽  
Doppler Weather Radar ◽  
Telecommunication System ◽  
Rainfall Prediction ◽  
Warm Core ◽  
Global Telecommunication System ◽  
The Impact ◽  
Ice Phase

Abstract The impact on tropical cyclone (TC) prediction from assimilating Doppler weather radar (DWR) observations obtained from the TC inner core and environment over the Bay of Bengal (BoB) is studied. A set of three operationally relevant numerical experiments were conducted for 24 forecast cases involving 5 unique severe/very severe BoB cyclones: Sidr (2007), Aila (2009), Laila (2010), Jal (2010), and Thane (2011). The first experiment (CNTL) used the NCEP FNL analyses for model initial and boundary conditions. In the second experiment [Global Telecommunication System (GTS)], the GTS observations were assimilated into the model initial condition while the third experiment (DWR) used DWR with GTS observations. Assimilation of the TC environment from DWR improved track prediction by 32%–53% for the 12–72-h forecast over the CNTL run and by 5%–25% over GTS and was consistently skillful. More gains were seen in intensity, track, and structure by assimilating inner-core DWR observations as they provided more realistic initial organization/asymmetry and strength of the TC vortex. Additional experiments were conducted to assess the role of warm-rain and ice-phase microphysics to assimilate DWR reflectivity observations. Results indicate that the ice-phase microphysics has a dominant impact on inner-core reflectivity assimilation and in modifying the intensity evolution, hydrometeors, and warm core structure, leading to improved rainfall prediction. This study helps provide a baseline for the credibility of an observational network and assist with the transfer of research to operations over the India monsoon region.

scholarly journals Significantly dominant warm-core eddies: An ecological indicator of the basin-scale low biological production in the Bay of Bengal

2021 ◽  
Vol 121 ◽  
pp. 107016
Author(s):  
R. Jyothibabu ◽  
C. Karnan ◽  
N. Arunpandi ◽  
S. Santhi Krishnan ◽  
K.K. Balachandran ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Ecological Indicator ◽  
Biological Production ◽  
Warm Core ◽  
Basin Scale

scholarly journals Microplankton size structure induced by a warm-core eddy in the western Bay of Bengal: Role of Trichodesmium abundance

Oceanologia ◽  
2021 ◽  
Author(s):  
Karnan Chinnadurai ◽  
Jyothibabu Retnamma ◽  
Arunpandi Nagarathinam ◽  
Pandiyarajan Rethinam Subramanian ◽  
Parthasarathi Singaram ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Size Structure ◽  
Warm Core ◽  
Western Bay Of Bengal

scholarly journals On forecasting tracks of tropical disturbances using ATOVS data over Bay of Bengal

MAUSAM ◽  
2021 ◽  
Vol 57 (4) ◽  
pp. 609-618
Author(s):  
R. SURESH ◽  
S. K. KUNDU ◽  
A. K. BHATNAGAR ◽  
R. C. BHATIA
Keyword(s):  
Life Cycle ◽  
Tropical Cyclones ◽  
Bay Of Bengal ◽  
Lead Time ◽  
Moderate Intensity ◽  
Tropical Depression ◽  
Warm Core ◽  
Microwave Sounding Unit ◽  
Microwave Sounding ◽  
Cyclonic Storms

lkj &,d m".kdfVca/kh; vonkc ds thou pØ ds vkadMs+ rFkk nks m".kdfVca/kh; pØokrh rwQkuksa ds o"kZ 2002&03 dh vof/k ds vkadMs+ mPp Vh- vks- oh- ,l- ¼,- Vh- vks- oh- ,l-½ /kzqod{kh; mixzgksa ,u- vks- ,- , 15 rFkk 16] ftuesa mPp lw{e rjaxh; ifjKkiu bdkbZ ¼,- ,e- ,l- ;w½ yxh gqbZ gaS ls izkIr fd, x, gSa ftudk fo’ys"k.k bu rwQkuksa ds ekxZ dk iwokZuqeku djus ds fy, fd;k x;k gSA bu ekSle fo{kksHkksa ds 700&400 gsDVkikLdy ¼gs-ik-½ Lrj esa e/; {kksHkeaMyh; m".krk e/; Lrjh ckfgokZg ds dkj.k gksrh gS tks rwQku ds 200&700 fd-eh- vkxs rd foLrkfjr gksrh gS rFkk fo{kksHkksa dh xfr’khyrk dk djhc 6 ls 24 ?kaVs igys iwokZuqeku djus esa iwoZ ladsrd dk dk;Z djrh gSA ;g fo{kksHk yxHkx mlh v{k dks vuqxeu djrk gS tks e/; {kksHkeaMy esa foLrkfjr ¼vkxs c<s+ gq,½ ftg~okdkj m".k {ks= dks dsUnz ls tksM+rk gSA e/;e rhozrk okys nks HkweaMyh; pØokrksa dh fLFkfr esa tc 7º ls 13º lsfYl;l rkieku dk m"edksj Åijh {kksHkeaMyh; Lrj ¼250&200 gs-ik-½ ds djhc dsafnzr jgk ml le; vonkc dh fLFkfr esa fdlh fo’ks"k m".krk dk irk ugha      pyk gSA  Advanced TOVS (ATOVS), comprising the Advanced Microwave Sounding Unit (AMSU), data obtained from polar orbiting satellites NOAA 15 and 16 during the life cycle of a tropical depression and two tropical cyclonic storms during 2002-03 have been analysed to predict the track of these disturbances.  The mid-tropospheric warming due to altostratus outflow from these weather disturbances in the layer 700 – 400 hPa which protrudes about  200 -700 km ahead the storm acts as a pre-cursor to predict the movement of the disturbances with a lead time of about      6 to 24 hours. The disturbance almost follows the axis connecting the centre with the warm tongue that protrudes ahead of  the disturbance in the mid-troposphere. While warm core of 7 to 13° C is centered around the upper tropospheric level (250 – 200 hPa) in the case the two moderate intensity tropical cyclones, no significant warmness could be seen in the depression stage.   

Geochemical partitioning of lead in sedimetns of the coastal environment, Bay of Bengal

2006 ◽  
Vol 1 (1) ◽  
pp. 35-40
Author(s):  
B.K. Sahu ◽  
K.S. Tripaty ◽  
Ejaz Ahmed
Keyword(s):  
Bay Of Bengal ◽  
Coastal Environment ◽  
Geochemical Partitioning

scholarly journals Some structural characteristics of pre-monsoon depression in the Bay of Bengal

MAUSAM ◽  
2021 ◽  
Vol 50 (1) ◽  
pp. 19-24
Author(s):  
S. K. ROY BHOWMIK ◽  
P. K. MISHRA
Keyword(s):  
Bay Of Bengal ◽  
Structural Characteristics ◽  
Monsoon Depression ◽  
Low Level ◽  
Significant Fall ◽  
Warm Core ◽  
Cold Core

During the period 6 to 16 May. 1995. three deep depressions formed one after another over west Bay of Bengal and moved from south to north. In this paper, structural characteristics of these systems are investigated from the distribution of thermal and thermodynamical field observed around the depression center utilising daily Rs/Rw and other available coastal observations during the period, Major findings of the study are: (i) The depressions have low level cold core and middle and upper tropospheric warm core. (ii) Thermal and moisture fields tilt north ward with height but vertical tilt of contour height is .not uniform at all levels, (iii) During intensification of the system significant increase in temperature and moisutre occurs above 700 hPa and significant fall of contour height occurs below 300 hPa.

Trichodesmium blooms and warm-core ocean surface features in the Arabian Sea and the Bay of Bengal

2017 ◽  
Vol 121 (1-2) ◽  
pp. 201-215 ◽  
Author(s):  
R. Jyothibabu ◽  
C. Karnan ◽  
L. Jagadeesan ◽  
N. Arunpandi ◽  
R.S. Pandiarajan ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Arabian Sea ◽  
Ocean Surface ◽  
Surface Features ◽  
Warm Core

scholarly journals Intensification of Aila (May 2009) due to a warm core eddy in the north Bay of Bengal

2011 ◽  
Vol 63 (3) ◽  
pp. 1515-1525 ◽  
Author(s):  
Y. Sadhuram ◽  
K. Maneesha ◽  
T. V. Ramana Murty
Keyword(s):  
Bay Of Bengal ◽  
The North ◽  
Warm Core
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