Scientific Priorities of NSIDC DAAC Data

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Presentation transcript:

Scientific Priorities of NSIDC DAAC Data An assessment based on input from several NSIDC and PoDAG scientists Mark Parsons 26 April 2001

Approach Initial response to lack of explicit scientific priorities 5 SPEC members and 4 PoDAG members prioritized DAAC data in four areas (1=hi, 3=lo) Included future and current data sets Limitations: low PoDAG participation data set titles only—many similar data sets From WCRP: 1.Value of the data set in PROCESS STUDIES. How it could be used "to improve knowledge of global and regional climates and their temporal variations and understanding of the responsible mechanisms 2.Value of the data set in MONITORING. How it could be used "to assess the evidence for significant trends in global and regional climates." 3.Value of the data set in MODELLING. How it could be used "to develop and improve physical-mathematical models capable of simulating, and assessing the predictability of the climate system over a range of space and time scales." 4.The basic INTRINSIC VALUE of the data set, i.e., it's uniqueness. Reviewers: Serreze, Scambos, Nolin, Weaver, Armstrong Francis, Shuman, Flato, Markus 26 April 2001 PoDAG XVIII

Average Priority Top 10 (n ≥ 12) 26 April 2001 PoDAG XVIII

Process Studies Top 5 (n ≥ 3) 26 April 2001 PoDAG XVIII

Monitoring Top 5 (n ≥ 3) 26 April 2001 PoDAG XVIII

Modeling Top 5 (n ≥ 3) 26 April 2001 PoDAG XVIII

Intrinsic Value Top 4 (n ≥ 4) 26 April 2001 PoDAG XVIII

Assessment of Heritage Data sea ice: all < 2 except charts, L2, and ESMR snow: all < 2 ice sheets: RAMP hi otherwise broad range PM Tb: only polar stereo < 2 AVHRR: all < 2 met/atmosphere: none n ≥ 9 sea ice: all < 2 except charts, L2, and ESMR snow: all < 2 ice sheets: RAMP hi otherwise broad range PM Tb: EASE slightly higher than PS AVHRR: all < 2 met/atmosphere : all < 2 26 April 2001 PoDAG XVIII

Assessment of EOS Data MODIS AMSR well considered (large n) sea ice low (>2) snow med. high (~1.5) albedo very high but small n (not planned) AMSR sea ice high (< 1.5) SWE medium high (~1.5) Tbs low but not well considered level 3 much higher than level 2 Non snow and ice products not considered 26 April 2001 PoDAG XVIII

Assessment of EOS Data GLAS not well considered (small n) Where considered all high except sea ice elevation many products not considered especially L1 L3 product not considered 26 April 2001 PoDAG XVIII

What Next? Map data sets to science questions and/or NRC report? Consider relative priority within parameter groups? Consider value of low level products vs. derived products? You tell me. Does it matter? (yes) 26 April 2001 PoDAG XVIII