GHRSST, V1, CGMS 41 July 2013 Coordination Group for Meteorological Satellites - CGMS Add CGMS...

GHRSST, V1, CGMS 41 July 2013

Coordination Group for Meteorological Satellites - CGMS

Add CGMS agency logo here (in the slide master)


Towards a sustainable high-resolution SST

measurement systemPresented to CGMS-41 Working Group II, WGII/9

Misako Kachi, JAXA

On behalf of the GHRSST Science Team




The GHRSST Mission

To provide operational users and the science community with SST measured by the satellite constellation

GHRSST provides a framework for SST knowledge and data sharing, best practices for data processing, assessing uncertainties in satellite SSTs, and a forum for scientific dialog including how best to provide

SSTs for climate studies, bringing SST to the operational users and scientific researchers.




GHRSST Overview

GHRSST, the Group for High Resolution Sea Surface Temperature grew out of a Pilot Project of the Global Ocean Data Assimilation Experiment (GODAE), 1997-2008.

Composed of a Science Team of researchers and operational practitioners. Coordinates research and operational developments in satellite-derived SST. Organized into Working Groups and Technical Advisory Groups focused on

particular problems or activities Data processing through Regional and Global Data Assembly Centers,

combining satellite and auxiliary fields into common data formats for ease of access and analysis.

Data are available in perpetuity at the GHRSST Long Term Stewardship and Reanalysis Facility at the NOAA National Oceanographic Data Center (http://ghrsst.nodc.noaa.gov).

See https://www.ghrsst.org/.

http://ghrsst.nodc.noaa.gov/

https://www.ghrsst.org/




GHRSST Organisation

International GHRSST Science Team

User Requirements for high resolution Sea Surface Temperature data products and services from operational, scientific, and climate communities.

GHRSST-PO Project OfficeCoordinator

GHRSST Data Assembly and

Systems Technical Advisory Group

(GDAS-TAG)

SSES and Validation

Technical Advisory Group

(STVAL-TAG)

Diurnal Variation Working

Group (DV-WG)

Climate Data Record


(CDR-TAG)

High Latitude Technical Advisory

Group (HL-TAG)

Estimation Methods Working Group

(EARWiG)

Inter-comparisons


(IC-TAG)

Applications and User

Services TAG (AUS-TAG)

Inland Waters

Working Group (IW-

WG)

GHRSST Advisory Council

CEOS SST Virtual Constellation

(SST-VC)




GHRSST Strategy

SST system quality control and uncertainty estimation

AnalysisProduct

s Net

CD

F f

orm

at

Input SST data of Varied format

& with no uncertainty estimates

Datamerging

andanalysis

SST Obs.

Products Net

CD

F f

orm

at

Add ancillary

QC: SSES & dynamic

flags

SSTMeasurements

ApplicationsL3/L3P

L1 Radiance data




Primary GHRSST data flow




GHRSST exploits complementary data sources

• Polar Orbiting infrared has high accuracy & spatial resolution • Geostationary infrared has high temporal resolution• Microwave Polar orbiting has all-weather capability

DataMerging

• In situ data provide reality in all weather conditions




Recent changes to the SST measurement system

Loss of AMSR-E Main microwave radiometer - source of "all-weather" SSTs

Loss of AATSR AATSR was the most accurate, dual-view infrared radiometer, and its

replacement will not fly for a couple of years leaving a problematic gap Launch of Suomi-NPP VIIRS

VIIRS is the prototype of the next generation US imager for environmental satellites

Launch of GCOM-W1 AMSR-2 Next generation microwave radiometer

Launch of METOP-B AVHRR & IASI; launch of MSG-3 SEVIRI Operational imagers providing SSTs from European polar and geo satellites




Key issues of relevance to CGMS:

GHRSST takes users requirements from many communities, including, for example: The WMO Rolling Requirements Review (RRR) GODAE Ocean View and JCOMM ETOOFS GCOS GHRSST Science Team members

GHRSST then synthesises these requirements into a common set of: Measurement requirements for both space based and surface based

instrumentation Includes a gap analyses and list of priorities

Scientific and technical challenges for on-going R&D elements Drives the program of the working groups and technical advisory

groups




To be considered by CGMS: GHRSST (together with the CEOS SST-VC) is preparing a white paper: “Sea Surface

Temperature Constellation: Vision for 2025” As part of its gap analysis, GHRSST has identified several issues that need urgent

attention if a sustainable high resolution SST measurement system is to be provided for operational systems and science users

Issues that need urgent attention include: Redundant capability needed for microwave SST measurements after loss of

AMSR-E (e.g. addition of scanning microwave radiometer on HY-2 series to supplement AMSR-2)

Geostationary SST over the full Indian Ocean to support future coupled assimilation (e.g. relocate Meteosat-8)

Replacement ‘reference’ satellite SST dataset needed after loss of AATSR (e.g. high quality subset of METOP AVHRR)

Assistance from CGMS is sought to address these issues

In addition, GHRSST would like the CGMS to consider Adopting the GHRSST data format for all SST datasets under its purview Using existing GHRSST capability for serving SST datasets to users Collaboration in the preparation of the SST Vision for 2025

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