upper-air observations for climate: rationale, progress, and plans for the gcos reference upper-air...
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Upper-air observations for climate: Rationale, progress, and plans for the GCOS Reference Upper-Air Network
(GRUAN)
Dian Seidel, Howard Diamond, David Goodrich, NOAAPeter Thorne, Met Office
AMS 25th Conference on International Interactive Information and Processing Systems (IIPS)for Meteorology, Oceanography, and Hydrology --- J5.1 15 January 2009 – Phoenix, AZ
• The who, what, where, when, why and how of GRUAN … in brief
• Related article to appear in March 2009 BAMS• Contributions from many GRUAN colleagues• Take home message:
After more than a decade of discussion, a GCOS Reference Upper Air Network, to provide climate-quality measurements of tropospheric and lower stratospheric variables, is starting to become a reality.
What is GRUAN?
• An international reference observing network• Designed to meet unmet climate requirements• Measuring GCOS “Essential Climate Variables”
Why do we need GRUAN?• Provide long-term, high quality upper-air climate
records, with complete estimates of measurement error
• Fully characterize the properties of the atmospheric column and their changes
• Constrain and adjust data from more spatially comprehensive global observing systems (including satellites and current radiosonde networks)
• Ensure that potential gaps in satellite programs do not invalidate the long-term climate record
Why do we need GRUAN?
Why do we need GRUAN?
Who will steer, manage, and operate GRUAN?
Who … the org. chart
Working Group on Atmospheric Reference Observationguides development of GRUANrecommends to AOPCsite selectionguidelines for observations, data diss.
Chair: Peter Thorne
GRUAN Lead Centremaking GRUAN happennetwork management
Head: Holger Vömel
GCOS Secretariatsupport to ARO, AOPC, GCOS Steering Comm.connective tissue
Director: Alexander Karpov
GCOS Steering CommitteeChair: John Zillman
Atmospheric Observation Panel for Climate (AOPC)Chair: Adrian Simmons
WMOGCOS co-sponsorLead Centre designation
Who … key partners
• National contributors (incl. US)• WCRP and the climate science community• Other monitoring networks, e.g.– Network for the Detection of Atmospheric Composition
Change– Baseline Surface Radiation Network• Global Space-based Inter-Calibration System• WMO - CIMO and CBS; Observations Department• NMS international departments, development
agencies
Where will GRUAN stations be?
What observations will be madeat GRUAN sites?
How will GRUAN observations be archived, disseminated, and used?
• GRUAN Data Center– distributed functions– built on existing capabilities at DWD, NOAA, DOE
• Ensure the early, ongoing and widespread use of GRUAN observations.
• Focus efforts on – characterizing observational error– improving satellite data products– understanding climate variability and change.
When will GRUAN measurements end?
• Continue as long as there is a need for in situ reference atmospheric profile observations for climate
• Several decades, at least• Until satellite (or other) observations can be
independently and unambiguously calibrated to international standards
More questions?Check out www.gruan.org
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