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Author
Venugopal, T. ; Ali, M.M. ; Bourassa, M.A. ; Zheng, Y. ; Goni, G.J. ; Foltz, G.R. ; Rajeevan, M.
Title
Statistical Evidence for the Role of Southwestern Indian Ocean Heat Content in the Indian Summer Monsoon Rainfall
Type
$loc['typeJournal Article']
Year
2018
Publication
SCIENTIFIC REPORTS
Abbreviated Journal
Sci Rep
Volume
8
Issue
1
Pages
12092
Keywords
SEA-SURFACE TEMPERATURE ; EL-NINO ; EQUATORIAL PACIFIC ; IMPACT ; PREDICTION ; ENSO ; DIPOLE ; REGION ; SST
Abstract
This study examines the benefit of using Ocean Mean Temperature (OMT) to aid in the prediction of the sign of Indian Summer Monsoon Rainfall (ISMR) anomalies. This is a statistical examination, rather than a process study. The thermal energy needed for maintaining and intensifying hurricanes and monsoons comes from the upper ocean, not just from the thin layer represented by sea surface temperature (SST) alone. Here, we show that the southwestern Indian OMT down to the depth of the 26 degrees C isotherm during January-March is a better qualitative predictor of the ISMR than SST. The success rate in predicting above- or below-average ISMR is 80% for OMT compared to 60% for SST. Other January-March mean climate indices (e.g., NINO3.4, Indian Ocean Dipole Mode Index, El Nino Southern Oscillation Modoki Index) have less predictability (52%, 48%, and 56%, respectively) than OMT percentage deviation (PD) (80%). Thus, OMT PD in the southwestern Indian Ocean provides a better qualitative prediction of ISMR by the end of March and indicates whether the ISMR will be above or below the climatological mean value.
Address
Ministry of Earth Sciences, Government of India, New Delhi, India
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
2045-2322
ISBN
Medium
Area
Expedition
Conference
Funding
strtoupper('3').strtolower('0108244'); strtoupper('P').strtolower('MC6092415')
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
972
Permanent link to this record
Author
Villas Bôas, A.B. ; Ardhuin, F. ; Ayet, A. ; Bourassa, M.A. ; Brandt, P. ; Chapron, B. ; Cornuelle, B.D. ; Farrar, J.T. ; Fewings, M.R. ; Fox-Kemper, B. ; Gille, S.T. ; Gommenginger, C. ; Heimbach, P. ; Hell, M.C. ; Li, Q. ; Mazloff, M.R. ; Merrifield, S.T. ; Mouche, A. ; Rio, M.H. ; Rodriguez, E. ; Shutler, J.D. ; Subramanian, A.C. ; Terrill, E.J. ; Tsamados, M. ; Ubelmann, C. ; van Sebille, E.
Title
Integrated Observations of Global Surface Winds, Currents, and Waves: Requirements and Challenges for the Next Decade
Type
$loc['typeJournal Article']
Year
2019
Publication
Frontiers in Marine Science
Abbreviated Journal
Front. Mar. Sci.
Volume
6
Issue
Pages
Keywords
Abstract
Ocean surface winds, currents, and waves play a crucial role in exchanges of momentum, energy, heat, freshwater, gases, and other tracers between the ocean, atmosphere, and ice. Despite surface waves being strongly coupled to the upper ocean circulation and the overlying atmosphere, efforts to improve ocean, atmospheric, and wave observations and models have evolved somewhat independently. From an observational point of view, community efforts to bridge this gap have led to proposals for satellite Doppler oceanography mission concepts, which could provide unprecedented measurements of absolute surface velocity and directional wave spectrum at global scales. This paper reviews the present state of observations of surface winds, currents, and waves, and it outlines observational gaps that limit our current understanding of coupled processes that happen at the air-sea-ice interface. A significant challenge for the coming decade of wind, current, and wave observations will come in combining and interpreting measurements from (a) wave-buoys and high-frequency radars in coastal regions, (b) surface drifters and wave-enabled drifters in the open-ocean, marginal ice zones, and wave-current interaction �hot-spots,� and (c) simultaneous measurements of absolute surface currents, ocean surface wind vector, and directional wave spectrum from Doppler satellite sensors.
Address
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Publisher
Place of Publication
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Summary Language
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Series Editor
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Series Volume
Series Issue
Edition
ISSN
2296-7745
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1064
Permanent link to this record
Author
Vinayachandran, P. N. ; Davidson, Fraser ; Chassignet, E. P.
Title
Towards joint assessments, modern capabilities and new links for ocean prediction systems
Type
$loc['typeJournal Article']
Year
2020
Publication
Bulletin of the American Meteorological Society
Abbreviated Journal
Bull. Amer. Meteor. Soc.
Volume
101
Issue
4
Pages
Keywords
Abstract
Approximately 260 individuals from forecasting centers, research laboratories, academia, and industry representing 40 countries met to discuss recent developments in operational oceanography and brainstorm about the future directions of ocean prediction services.
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ISBN
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Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1091
Permanent link to this record
Author
Wang, S. ; Kranz, S.A. ; Kelly, T.B. ; Song, H. ; Stukel, M.R. ; Cassar, N.
Title
Lagrangian Studies of Net Community Production: The Effect of Diel and Multiday Nonsteady State Factors and Vertical Fluxes on O2 /Ar in a Dynamic Upwelling Region
Type
$loc['typeJournal Article']
Year
2020
Publication
Journal of Geophysical Research: Biogeosciences
Abbreviated Journal
J. Geophys. Res. Biogeosci.
Volume
125
Issue
6
Pages
e2019JG005569
Keywords
net community production ; O2/Ar ; California Current Ecosystem ; Lagrangian measurements ; vertical fluxes ; nonsteady state
Abstract
The ratio of dissolved oxygen to argon in seawater is frequently employed to estimate rates of net community production (NCP) in the oceanic mixed layer. The in situ O2/Ar‐based method accounts for many physical factors that influence oxygen concentrations, permitting isolation of the biological oxygen signal produced by the balance of photosynthesis and respiration. However, this technique traditionally relies upon several assumptions when calculating the mixed‐layer O2/Ar budget, most notably the absence of vertical fluxes of O2/Ar and the principle that the air‐sea gas exchange of biological oxygen closely approximates net productivity rates. Employing a Lagrangian study design and leveraging data outputs from a regional physical oceanographic model, we conducted in situ measurements of O2/Ar in the California Current Ecosystem in spring 2016 and summer 2017 to evaluate these assumptions within a �worst‐case� field environment. Quantifying vertical fluxes, incorporating nonsteady state changes in O2/Ar, and comparing NCP estimates evaluated over several day versus longer timescales, we find differences in NCP metrics calculated over different time intervals to be considerable, also observing significant potential effects from vertical fluxes, particularly advection. Additionally, we observe strong diel variability in O2/Ar and NCP rates at multiple stations. Our results reemphasize the importance of accounting for vertical fluxes when interpreting O2/Ar‐derived NCP data and the potentially large effect of nonsteady state conditions on NCP evaluated over shorter timescales. In addition, diel cycles in surface O2/Ar can also bias interpretation of NCP data based on local productivity and the time of day when measurements were made.
Address
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Publisher
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Series Editor
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Series Volume
Series Issue
Edition
ISSN
2169-8953
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1114
Permanent link to this record
Author
Weissman, D. E. ; Apgar, G. ; Tongue, J. S. ; Bourassa, M. A.
Title
Corrections to the SeaWinds scatterometer wind vectors by removing rain effects
Type
$loc['typeJournal Article']
Year
2005
Publication
Bulletin of the American Meteorological Society
Abbreviated Journal
Volume
86
Issue
Pages
621-622
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
907
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Author
Weissman, D.E. ; Bourassa, M.A.
Title
Measurements of the Effect of Rain-Induced Sea Surface Roughness on the QuikSCAT Scatterometer Radar Cross Section
Type
$loc['typeJournal Article']
Year
2008
Publication
IEEE Transactions on Geoscience and Remote Sensing
Abbreviated Journal
IEEE Trans. Geosci. Remote Sensing
Volume
46
Issue
10
Pages
2882-2894
Keywords
Abstract
Address
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Publisher
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Series Editor
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Series Volume
Series Issue
Edition
ISSN
0196-2892
ISBN
Medium
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Conference
Funding
NASA, OVWST, NASA HQ
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
681
Permanent link to this record
Author
Weissman, D.E. ; Bourassa, M.A. ; O'Brien, J.J. ; Tongue, J.S.
Title
Calibrating the quikscat/seawinds radar for measuring rainrate over the oceans
Type
$loc['typeJournal Article']
Year
2003
Publication
IEEE Transactions on Geoscience and Remote Sensing
Abbreviated Journal
IEEE Trans. Geosci. Remote Sensing
Volume
41
Issue
12
Pages
2814-2820
Keywords
Next Generation Weather Radar (NEXRAD) ; precipitation ; radar reflectivity ; scatterometer normalized radar cross section (NRCS) ; space-based radar ; Tropical Rain Measuring Mission (TRMM)
Abstract
Address
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Series Editor
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ISSN
0196-2892
ISBN
Medium
Area
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Conference
Funding
NASA
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
468
Permanent link to this record
Author
Weissman, DE ; Morey, S ; Bourassa, M
Title
Studies of the effects of rain on the performance of the SMAP radiometer surface salinity estimates and applications to remote sensing of river plumes
Type
$loc['typeConference Article']
Year
2017
Publication
IEEE International Symposium on Geoscience and Remote Sensing IGARSS
Abbreviated Journal
Volume
Issue
Pages
1491-1494
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Abstract
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
834
Permanent link to this record
Author
Williford, C. E. ; Krishnamurti, T.N. ; Torres, R.C. ; Cocke, S. ; Christidis, Z. ; Vijaya Kumar, T.S.
Title
Real-Time Multimodel Superensemble Forecasts of Atlantic Tropical Systems of 1999
Type
$loc['typeJournal Article']
Year
2003
Publication
Monthly Weather Review
Abbreviated Journal
Mon. Wea. Rev.
Volume
131
Issue
8
Pages
1878-1894
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ISSN
0027-0644
ISBN
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
839
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Author
Winsberg, M. D. ; O'Brien, J. J. ; Zierden, D. ; Griffin, M.
Title
Florida Weather
Type
$loc['typeBook Whole']
Year
2003
Publication
Abbreviated Journal
Volume
Issue
Pages
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University Press of Florida
Place of Publication
Gainesville, FL
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ISBN
Medium
Area
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
841
Permanent link to this record