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Author
Hite, M. ; Bourassa, M. A. ; O'Brien, J. J.
Title
Objective detection of Atlantic tropical disturbances
Type
$loc['typeConference Article']
Year
2006
Publication
14th Conference on Interactions of the Sea and Atmosphere, AMS, Monterey, CA, USA
Abbreviated Journal
Volume
Issue
Pages
cdrom
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Summary Language
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ISBN
Medium
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Conference
Funding
NASA, OVWST, OSU, TCSP
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
932
Permanent link to this record
Author
Karmakar, N. ; Misra, V.
Title
The Relation of Intraseasonal Variations With Local Onset and Demise of the Indian Summer Monsoon
Type
$loc['typeJournal Article']
Year
2019
Publication
Journal of Geophysical Research: Atmospheres
Abbreviated Journal
J. Geophys. Res. Atmos.
Volume
124
Issue
5
Pages
2483-2506
Keywords
hydroclimatic, Indian Summer Monsoon, Intraseasonal Oscillations, eastern Indiawestward propagating
Abstract
Two of the most important hydroclimatic features of the Indian Summer Monsoon (ISM) rainfall are its onset/demise and Intraseasonal Oscillations (ISOs) manifested by the active‐break cycles. In this study, we aim to understand the quantitative association between these two phenomena. An objective definition of local onset/demise of the ISM based on more than a century‐long India Meteorological Department (IMD) rain‐gauge observation is taken into consideration. Using multichannel singular spectrum analysis (MSSA) we isolate northward propagating low‐ (20–60 days; LF‐ISO) and northwestward propagating high‐ (10–20 days; HF‐ISO) frequency ISOs from the daily ISM rainfall. Our results suggest that a large number of local onset (59%) and demise (62%) events occur during positive developing phases and positive decaying phases of two ISOs, respectively, with phase‐locking between LF‐ISO and HF‐ISO being particularly important. Local onset is largely associated with favorable phases of ISOs across India except for LF‐ISO over eastern India and HF‐ISO over western Ghats and central India (CI). We find that local demise is more coherent with the ISO phases, especially with HF‐ISO across the domain. We performed a case study to understand large‐scale association with the onset of the ISM over CI. In 44 of total 58 cases (1948–2005), when CI onset occurred during favorable LF‐ISO or HF‐ISO phase, they are either linked with a northward propagation of convection from the equator in LF‐ISO timescale (28 cases) or westward propagating structures from the western Pacific in HF‐ISO timescale (27 cases).
Address
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Thesis
Publisher
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Editor
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Summary Language
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Series Editor
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Edition
ISSN
2169-897X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1014
Permanent link to this record
Author
Karmakar, N. ; Misra, V.
Title
Differences in Northward Propagation of Convection Over the Arabian Sea and Bay of Bengal During Boreal Summer
Type
$loc['typeJournal Article']
Year
2019
Publication
Journal of Geophysical Research: Atmospheres
Abbreviated Journal
J. Geophys. Res. Atmos.
Volume
125
Issue
3
Pages
Keywords
Abstract
The governing dynamics that modulate the propagation characteristics of intraseasonal oscillations (ISO) during summer monsoon over the two ocean basins, Bay of Bengal (BoB) and Arabian Sea (AS), are investigated using observational analysis and high‐resolution regional coupled ocean‐atmosphere climate model simulations. ISO features are extracted over the Indian region using a data‐adaptive spectral method called multichannel singular spectrum analysis. ISO exhibits stronger intensity over the BoB than over the AS. But ISO‐filtered rainfall propagates at a faster rate ( urn:x-wiley:jgrd:media:jgrd55983:jgrd55983-math-00011.25°/day) over AS as compared to BoB ( urn:x-wiley:jgrd:media:jgrd55983:jgrd55983-math-0002.74°/day), giving rise to a northwest‐southeast tilted band of rainfall anomalies. However, the composite diagrams of several atmospheric fields associated with northward propagation like vorticity, low‐level convergence, and oceanic variables like sea surface temperature and mixed layer depth do not show this difference in propagation speed and all exhibit a speed of nearly 0.75°/day in both the ocean basins. The difference in speed of ISO‐filtered rainfall is explained through moisture flux convergence. Anomalous horizontal moisture advection plays a major role over AS in preconditioning the atmosphere and making it favorable for convection. Anomalous wind acting on climatological moisture gradient is the dominant term in the moisture advection equation. Easterly wind anomalies associated with a low‐level anticyclone over India helps advect moisture from the eastern side of the domain. The northwest‐southeast tilt of ISO is dictated by the atmospheric processes of moisture advection with the upper ocean playing a more passive role in causing the tilt.
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Publisher
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Summary Language
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Series Editor
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Edition
ISSN
2169-897X
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1099
Permanent link to this record
Author
Kozar, M.E. ; Mann, M.E. ; Camargo, S.J. ; Kossin, J.P. ; Evans, J.L.
Title
Stratified statistical models of North Atlantic basin-wide and regional tropical cyclone counts
Type
$loc['typeJournal Article']
Year
2012
Publication
Journal of Geophysical Research: Atmospheres
Abbreviated Journal
J. Geophys. Res.
Volume
117
Issue
D18
Pages
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0148-0227
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
239
Permanent link to this record
Author
Kozar, M.E. ; Mann, M.E. ; Emanuel, K.A. ; Evans, J.L.
Title
Long-term variations of North Atlantic tropical cyclone activity downscaled from a coupled model simulation of the last millennium
Type
$loc['typeJournal Article']
Year
2013
Publication
Journal of Geophysical Research: Atmospheres
Abbreviated Journal
J. Geophys. Res. Atmos.
Volume
118
Issue
24
Pages
13,383-13,392
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Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
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Summary Language
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Series Editor
Series Title
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Series Issue
Edition
ISSN
2169897X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
174
Permanent link to this record
Author
Legler, D. M. ; Bourassa, M. A. ; Rao, A. D. ; O'Brien, J. J.
Title
NSCAT Surface Wind Fields Using Optimally Tuned Direct Minimization Techniques
Type
$loc['typeConference Article']
Year
1998
Publication
Ninth Conference on interaction of the Sea and Atmosphere, American Meteorological Society, Phoenix, AZ, USA
Abbreviated Journal
Volume
Issue
Pages
32-35
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Summary Language
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Series Editor
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Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
755
Permanent link to this record
Author
Legler, DM ; Bourassa, MA ; Rao, AD ; O'Brien, JJ
Title
NSCAT surface wind fields using optimally tuned direct minimization techniques
Type
$loc['typeConference Article']
Year
1998
Publication
9th Conference on Interaction of the Sea and Atmosphere at the 78th American-Meteorogical-Society Annual Meeting
Abbreviated Journal
Volume
Issue
Pages
32-35
Keywords
Abstract
Address
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Thesis
Publisher
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Editor
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Summary Language
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Series Editor
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Edition
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ISBN
Medium
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Expedition
Conference
9th Conference on Interaction of the Sea and Atmosphere at the 78th American-Meteorogical-Society Annual Meeting
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
540
Permanent link to this record
Author
Li, H. ; Kanamitsu, M. ; Hong, S.-Y.
Title
California reanalysis downscaling at 10 km using an ocean-atmosphere coupled regional model system
Type
$loc['typeJournal Article']
Year
2012
Publication
Journal of Geophysical Research: Atmospheres
Abbreviated Journal
J. Geophys. Res.
Volume
117
Issue
D12
Pages
Keywords
climate change ; coupled model ; reanalysis ; upwelling ; regional climate ; regional ocean model
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
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Summary Language
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Series Editor
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Series Volume
Series Issue
Edition
ISSN
0148-0227
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
265
Permanent link to this record
Author
Meyers, SD ; O'Brien, JJ
Title
Historical reconstruction of the 1868-1993 ENSO cycle using EOF climate basis functions
Type
$loc['typeConference Article']
Year
1998
Publication
9th Conference on Interaction of the Sea and Atmosphere at the 78th American-Meteorogical-Society Annual Meeting
Abbreviated Journal
Volume
Issue
Pages
203-233
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
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Summary Language
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Series Editor
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Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
9th Conference on Interaction of the Sea and Atmosphere at the 78th American-Meteorogical-Society Annual Meeting
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
542
Permanent link to this record
Author
Misra, V. ; Mishra, A.
Title
The oceanic influence on the rainy season of Peninsular Florida
Type
$loc['typeJournal Article']
Year
2016
Publication
Journal of Geophysical Research: Atmospheres
Abbreviated Journal
J. Geophys. Res. Atmos.
Volume
121
Issue
13
Pages
7691-7709
Keywords
rainy season ; Florida Current
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
2169897X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
45
Permanent link to this record