Satellite sea surface salinity in response to freshwater processes in the Hudson Bay

Satellite sea surface salinity in response to freshwater processes in the Hudson Bay

American Geophysical Union (AGU) Fall Meeting, 9-13 December 2019, San Francisco

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Main Authors: Tang, Wenqing, Yueh, Simon, Yang, Daqing, Mcleod, Ellie, Fore, Alexander, Hayashi, Akiko, Olmedo, Estrella, Martínez, Justino, Gabarró, Carolina
Format: comunicación de congreso biblioteca
Published: American Geophysical Union 2019-12-12
Online Access:http://hdl.handle.net/10261/207626
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spelling dig-icm-es-10261-2076262020-04-15T09:52:19Z Satellite sea surface salinity in response to freshwater processes in the Hudson Bay Tang, Wenqing Yueh, Simon Yang, Daqing Mcleod, Ellie Fore, Alexander Hayashi, Akiko Olmedo, Estrella Martínez, Justino Gabarró, Carolina American Geophysical Union (AGU) Fall Meeting, 9-13 December 2019, San Francisco Hudson Bay (HB) is the largest inland sea in Northern Hemisphere. HB is covered by sea ice and snow in winter while complete open water in summer. It is known that two processes dominate HB freshwater cycle: runoff from surrounding rivers, and low salinity water released (trapped) when ice melts (freezes). This study examines the inter annual anomaly of satellite sea surface salinity (SSS) in the context of HB freshwater cycle. We analyze 4 years (5/2015-4/2019) of SSS data from SMAP (JPL V4.2) and SMOS (BEC V3.0) in conjunction of relevant data, including daily discharge rate from rivers surrounding HB from Canada, daily sea ice concentration from National Snow and Ice Data Center (NSIDC), precipitation from NOAA (CMAP), and evaporation from OAflux. Dividing the Hudson Bay system into sub-regions, we examine local freshwater contents in each sub-domain. We found river discharge and seasonal sea ice changes indeed dominate SSS inter-annual variability, but at different time and locations; while the surface forcing (P-E) plays a minor role. Particularly, in area along the path of river discharge such as the James and eastern Hudson Bay, the abnormally low SSS patches shown in August 2015 could be linked with anomalous positive river discharge for the season, with 2-3 months delay. On the other hand, in area of interior Hudson Bay, the SSS response to sea ice changes seems immediate and strong. For example, when sea ice melts abnormally early in June 2017, SSS shows extremely fresh signature in the area more than one month earlier than other years. We estimate yields, i.e. the contribution from runoff, sea ice and P-E respectively in terms of the HB freshwater contents. We also report SSS variability at two HB gateways: one connects HB with Foxe Basin, where Arctic Ocean water transports into HB; other at entrance to the Hudson Strait, which is the corridor between HB and the North Atlantic Ocean. This study demonstrates the feasibility of using SSS to gain quantitative understanding of freshwater components and contributions. Moreover, it serves as an alternative validation approach for satellite SSS retrieval in the high latitudes regions, such as HB, where very limited in situ salinity observations during the SMAP period are available for direct comparison. We will also discuss issues regarding future retrieval algorithm improvement 2020-04-15T09:51:05Z 2020-04-15T09:51:05Z 2019-12-12 2020-04-15T09:51:06Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 2019 AGU Fall Meeting (2019) http://hdl.handle.net/10261/207626 https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/526389 Sí none American Geophysical Union
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
description American Geophysical Union (AGU) Fall Meeting, 9-13 December 2019, San Francisco
format comunicación de congreso
author Tang, Wenqing
Yueh, Simon
Yang, Daqing
Mcleod, Ellie
Fore, Alexander
Hayashi, Akiko
Olmedo, Estrella
Martínez, Justino
Gabarró, Carolina
spellingShingle Tang, Wenqing
Yueh, Simon
Yang, Daqing
Mcleod, Ellie
Fore, Alexander
Hayashi, Akiko
Olmedo, Estrella
Martínez, Justino
Gabarró, Carolina
Satellite sea surface salinity in response to freshwater processes in the Hudson Bay
author_facet Tang, Wenqing
Yueh, Simon
Yang, Daqing
Mcleod, Ellie
Fore, Alexander
Hayashi, Akiko
Olmedo, Estrella
Martínez, Justino
Gabarró, Carolina
author_sort Tang, Wenqing
title Satellite sea surface salinity in response to freshwater processes in the Hudson Bay
title_short Satellite sea surface salinity in response to freshwater processes in the Hudson Bay
title_full Satellite sea surface salinity in response to freshwater processes in the Hudson Bay
title_fullStr Satellite sea surface salinity in response to freshwater processes in the Hudson Bay
title_full_unstemmed Satellite sea surface salinity in response to freshwater processes in the Hudson Bay
title_sort satellite sea surface salinity in response to freshwater processes in the hudson bay
publisher American Geophysical Union
publishDate 2019-12-12
url http://hdl.handle.net/10261/207626
work_keys_str_mv AT tangwenqing satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT yuehsimon satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT yangdaqing satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT mcleodellie satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT forealexander satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT hayashiakiko satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT olmedoestrella satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT martinezjustino satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
AT gabarrocarolina satelliteseasurfacesalinityinresponsetofreshwaterprocessesinthehudsonbay
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