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Author
Kipkogei, O. ; Bhardwaj, A. ; Kumar, V. ; Ogallo, L.A. ; Opijah, F.J. ; Mutemi, J.N. ; Krishnamurti, T.N.
Title
Improving multimodel medium range forecasts over the Greater Horn of Africa using the FSU superensemble
Type
$loc['typeJournal Article']
Year
2016
Publication
Meteorology and Atmospheric Physics
Abbreviated Journal
Meteorol Atmos Phys
Volume
128
Issue
4
Pages
441-451
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
0177-7971
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
82
Permanent link to this record
Author
Misra, V. ; Bhardwaj, A.
Title
Understanding the seasonal variations of Peninsular Florida
Type
$loc['typeJournal Article']
Year
2019
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
54
Issue
3-4
Pages
1873-1885
Keywords
Abstract
This study accounts for varying lengths of the seasons, which turns out to be an important consideration of climate variability over Peninsular Florida (PF). We introduce an objective definition for the onset and demise of the winter season over relatively homogenous regions within PF: North Florida (NF), Central Florida (CF), Southeast Florida (SeF), and Southwest Florida (SwF). We first define the summer season based on precipitation, and follow this by defining the winter season using surface temperature analysis. As a consequence, of these definitions of the summer and the winter seasons, the lengths of the transition seasons of spring and fall also vary from year to year. The onset date variations have a robust relationship with the corresponding seasonal length anomalies across PF for all seasons. Furthermore, with some exceptions, the onset date variations are associated with corresponding seasonal rainfall and surface temperature anomalies, which makes monitoring the onset date of the seasons a potentially useful predictor of the following evolution of the season. In many of these instances the demise date variations of the season also have a bearing on the preceding seasonal length and seasonal rainfall anomalies. However, we find that variations of the onset and the demise dates are independent of each other across PF and in all seasons. We also find that the iconic ENSO teleconnection over PF is exclusive to the seasonal rainfall anomalies and it does not affect the variations in the length of the winter season. Given these findings, we strongly suggest monitoring and predicting the variations in the lengths of the seasons over PF as it is not only an important metric of climate variability but also beneficial to reduce a variety of risks of impact of anomalous seasonal climate variations.
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
0930-7575
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1098
Permanent link to this record
Author
Bhardwaj, A. ; Misra, V.
Title
The role of air-sea coupling in the downscaled hydroclimate projection over Peninsular Florida and the West Florida Shelf
Type
$loc['typeJournal Article']
Year
2019
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
53
Issue
5-6
Pages
2931-2947
Keywords
Abstract
A comparative analysis of two sets of downscaled simulations of the current climate and the future climate projections over Peninsular Florida (PF) and the West Florida Shelf (WFS) is presented to isolate the role of high-resolution air-sea coupling. In addition, the downscaled integrations are also compared with the much coarser, driving global model projection to examine the impact of grid resolution of the models. The WFS region is habitat for significant marine resources, which has both commercial and recreational value. Additionally, the hydroclimatic features of the WFS and PF contrast each other. For example, the seasonal cycle of surface evaporation in these two regions are opposite in phase to one another. In this study, we downscale the Community Climate System Model version 4 (CCSM4) simulations of the late twentieth century and the mid-twenty-first century (with reference concentration pathway 8.5 emission scenario) using an atmosphere only Regional Spectral Model (RSM) at 10 km grid resolution. In another set, we downscale the same set of CCSM4 simulations using the coupled RSM-Regional Ocean Model System (RSMROMS) at 10 km grid resolution. The comparison of the twentieth century simulations suggest significant changes to the SST simulation over WFS from RSMROMS relative to CCSM4, with the former reducing the systematic errors of the seasonal mean SST over all seasons except in the boreal summer season. It may be noted that owing to the coarse resolution of CCSM4, the comparatively shallow bathymetry of the WFS and the sharp coastline along PF is poorly defined, which is significantly rectified at 10 km grid spacing in RSMROMS. The seasonal hydroclimate over PF and the WFS in the twentieth century simulation show significant bias in all three models with CCSM4 showing the least for a majority of the seasons, except in the wet June-July-August (JJA) season. In the JJA season, the errors of the surface hydroclimate over PF is the least in RSMROMS. The systematic errors of surface precipitation and evaporation are more comparable between the simulations of CCSM4 and RSMROMS, while they differ the most in moisture flux convergence. However, there is considerable improvement in RSMROMS compared to RSM simulations in terms of the seasonal bias of the hydroclimate over WFS and PF in all seasons of the year. This suggests the potential rectification impact of air-sea coupling on dynamic downscaling of CCSM4 twentieth century simulations. In terms of the climate projection in the decades of 2041-2060, the RSMROMS simulation indicate significant drying of the wet season over PF compared to moderate drying in CCSM4 and insignificant changes in the RSM projection. This contrasting projection is also associated with projected warming of SSTs along the WFS in RSMROMS as opposed to warming patterns of SST that is more zonal and across the WFS in CCSM4.
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
0930-7575
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1082
Permanent link to this record
Author
Krishnamurti, T.N. ; Kumar, V. ; Simon, A. ; Thomas, A. ; Bhardwaj, A. ; Das, S. ; Senroy, S. ; Roy Bhowmik, S.K.
Title
March of buoyancy elements during extreme rainfall over India
Type
$loc['typeJournal Article']
Year
2017
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
48
Issue
5-6
Pages
1931-1951
Keywords
Monsoon ; Mesoscale ; Buoyancy
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
0930-7575
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
84
Permanent link to this record
Author
Misra, V. ; Bhardwaj, A.
Title
Defining the Northeast Monsoon of India
Type
$loc['typeJournal Article']
Year
2019
Publication
Monthly Weather Review
Abbreviated Journal
Mon. Wea. Rev.
Volume
147
Issue
3
Pages
791-807
Keywords
Indian Summer Monsoon, intraseasonal,Climate models, variability, NEM, rainfall
Abstract
This study introduces an objective definition for onset and demise of the Northeast Indian Monsoon (NEM). The definition is based on the land surface temperature analysis over the Indian subcontinent. It is diagnosed from the inflection points in the daily anomaly cumulative curve of the area-averaged surface temperature over the provinces of Andhra Pradesh, Rayalseema, and Tamil Nadu located in the southeastern part of India. Per this definition, the climatological onset and demise dates of the NEM season are 6 November and 13 March, respectively. The composite evolution of the seasonal cycle of 850hPa winds, surface wind stress, surface ocean currents, and upper ocean heat content suggest a seasonal shift around the time of the diagnosed onset and demise dates of the NEM season. The interannual variations indicate onset date variations have a larger impact than demise date variations on the seasonal length, seasonal anomalies of rainfall, and surface temperature of the NEM. Furthermore, it is shown that warm El Niño�Southern Oscillation (ENSO) episodes are associated with excess seasonal rainfall, warm seasonal land surface temperature anomalies, and reduced lengths of the NEM season. Likewise, cold ENSO episodes are likely to be related to seasonal deficit rainfall anomalies, cold land surface temperature anomalies, and increased lengths of the NEM season.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0027-0644
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ rl18 @
Serial
999
Permanent link to this record
Author
Misra, V. ; Mishra, A. ; Bhardwaj, A.
Title
Simulation of the Intraseasonal Variations of the Indian Summer Monsoon in a Regional Coupled Ocean-Atmosphere Model
Type
$loc['typeJournal Article']
Year
2018
Publication
Journal of Climate
Abbreviated Journal
J. Climate
Volume
31
Issue
8
Pages
3167-3185
Keywords
Asia ; Indian Ocean ; Mixed layer ; Monsoons ; Atmosphere-ocean interaction ; Regional models
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
0894-8755
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
557
Permanent link to this record
Author
Misra, V. ; Bhardwaj, A. ; Noska, R.
Title
Understanding the Variations of the Length and the Seasonal Rainfall Anomalies of the Indian Summer Monsoon
Type
$loc['typeJournal Article']
Year
2017
Publication
Journal of Climate
Abbreviated Journal
J. Climate
Volume
30
Issue
5
Pages
1753-1763
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
0894-8755
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
27
Permanent link to this record
Author
Krishnamurti, T.N. ; Dubey, S. ; Kumar, V. ; Deepa, R. ; Bhardwaj, A.
Title
Scale interaction during an extreme rain event over southeast India
Type
$loc['typeJournal Article']
Year
2017
Publication
Quarterly Journal of the Royal Meteorological Society
Abbreviated Journal
Q.J.R. Meteorol. Soc
Volume
143
Issue
704
Pages
1442-1458
Keywords
scale interaction ; extreme rain ; southeast India
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
0035-9009
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
65
Permanent link to this record
Author
Misra, V. ; Mishra, A. ; Bhardwaj, A.
Title
High-resolution regional-coupled ocean-atmosphere simulation of the Indian Summer Monsoon
Type
$loc['typeJournal Article']
Year
2017
Publication
International Journal of Climatology
Abbreviated Journal
Int. J. Climatol
Volume
37
Issue
Pages
717-740
Keywords
monsoon ; regional model ; ENSO
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
0899-8418
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
15
Permanent link to this record
Author
Misra, V. ; Groenen, D. ; Bhardwaj, A. ; Mishra, A.
Title
The warm pool variability of the tropical northeast Pacific
Type
$loc['typeJournal Article']
Year
2016
Publication
International Journal of Climatology
Abbreviated Journal
Int. J. Climatol.
Volume
36
Issue
14
Pages
4625-4637
Keywords
warm pool ; ENSO ; monsoon
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
0899-8418
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
44
Permanent link to this record