Next Article in Journal
Air-Sea Interactions over Eddies in the Brazil-Malvinas Confluence
Next Article in Special Issue
Extreme Wind Speeds Retrieval Using Sentinel-1 IW Mode SAR Data
Previous Article in Journal
Small Unmanned Aircraft (sUAS)-Deployed Thermal Infrared (TIR) Imaging for Environmental Surveys with Implications in Submarine Groundwater Discharge (SGD): Methods, Challenges, and Novel Opportunities
Previous Article in Special Issue
Analyzing Gaps in Hurricane Rain Coverage to Inform Future Satellite Proposals
Article

Evaluating the Detection of Mesoscale Outflow Boundaries Using Scatterometer Winds at Different Spatial Resolutions

1
Department of Atmospheric Sciences, University of Alabama in Huntsville, Huntsville, AL 35899, USA
2
Marshall Flight Space Center, NASA, Huntsville, AL 35808, USA
3
Department of Atmospheric Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
4
Remote Sensing Systems, Santa Rosa, CA 95401, USA
5
Department of Earth Science, University of Alabama in Huntsville, Huntsville, AL 35899, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Mark A. Bourassa, Stephen R. Guimond and Heather M. Holbach
Remote Sens. 2021, 13(7), 1334; https://doi.org/10.3390/rs13071334
Received: 23 February 2021 / Revised: 23 March 2021 / Accepted: 25 March 2021 / Published: 31 March 2021
(This article belongs to the Special Issue High Winds and High Seas)
Outflow boundaries induced by cold-pools are a key characteristic of convective systems related to microphysical and kinematic processes during the mature stage of their lifecycle. Over the ocean, such kinematic processes are associated with low-level wind modulations that are captured by scatterometers. This study investigates the ability of the Advanced Scatterometer (ASCAT) wind retrievals to detect the outflow boundary associated with an oceanic mesoscale convective system (MCS). Leveraging a new technique to identify cold pools that is based on features that enclose elevated magnitude of the gradient of the wind, termed as ‘Gradient Feature’ (GF), wind retrievals at 50-, 25- and 7-km spatial resolution were utilized to explore how the characteristics of the outflow boundary vary with resolution. Ground-based radar retrievals were also implemented to assess and correct, when possible, the performance of the ASCAT retrievals. The magnitude of the gradient of the wind for the coarser resolution was an order of magnitude smaller (104 s1) than the finer ones (103 s1). An increase in the magnitude of the gradient wind field associated with the outflow boundary was captured by all resolutions and a respective feature was identified by the GF method. The location of the features relative to the distance from the front edge of the MCS decreased with resolution, indicating the importance of the high resolution ASCAT product to capture their extent, as well as additional smaller scale features. The effect of the background wind field on the selection of the final wind field during the ambiguity removal process for the high-resolution product is also discussed. View Full-Text
Keywords: ocean surface winds; scatterometer; ASCAT; oceanic convection; mesoscale structures; outflow boundary; precipitation; radar ocean surface winds; scatterometer; ASCAT; oceanic convection; mesoscale structures; outflow boundary; precipitation; radar
Show Figures

Graphical abstract

MDPI and ACS Style

Priftis, G.; Lang, T.J.; Garg, P.; Nesbitt, S.W.; Lindsley, R.D.; Chronis, T. Evaluating the Detection of Mesoscale Outflow Boundaries Using Scatterometer Winds at Different Spatial Resolutions. Remote Sens. 2021, 13, 1334. https://doi.org/10.3390/rs13071334

AMA Style

Priftis G, Lang TJ, Garg P, Nesbitt SW, Lindsley RD, Chronis T. Evaluating the Detection of Mesoscale Outflow Boundaries Using Scatterometer Winds at Different Spatial Resolutions. Remote Sensing. 2021; 13(7):1334. https://doi.org/10.3390/rs13071334

Chicago/Turabian Style

Priftis, Georgios, Timothy J. Lang, Piyush Garg, Stephen W. Nesbitt, Richard D. Lindsley, and Themistoklis Chronis. 2021. "Evaluating the Detection of Mesoscale Outflow Boundaries Using Scatterometer Winds at Different Spatial Resolutions" Remote Sensing 13, no. 7: 1334. https://doi.org/10.3390/rs13071334

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop