Cooperative Institute for Research in Environmental Sciences

Cryospheric and Polar Processes Seminar

Wednesday November 29 2017 @ 11:00 am
to 12:00 pm

November

29

Wed

2017

11:00 am - 12:00 pm

Availability

Open to Public

Audience
  • CIRES employees
  • CU Boulder employees
  • General Public
  • NOAA employees
  • Science collaborators
  • Host
    NSIDC

    Known Knowns, Known Unknowns, and Unknown Unknowns about Uncertainties in Passive Microwave Sea Ice Data By Walt Meier, Senior Research Scientist, DAAC Scientist, National Snow and Ice Data Center, CIRES, University of Colorado
     
    Abstract:
    Sea ice data from passive microwave sensors are the basis for one of the longest satellite-derived climate records. While there are many advantages in using passive microwave sensors for sea ice, including complete and consistent daily coverage, there are also many known uncertainties in using the data. These known uncertainties are helpful in guiding use of the data. However, there are many aspects of the uncertainties that are not well known, particularly at the grid cell level. Only recently have some sea ice concentration products started to provide grid cell uncertainty estimates. However, these uncertainty estimates have not themselves been validated – they are unknown unknowns. This talk will focus on recent efforts to validate the concentration uncertainty estimates through comparisons with concentrations derived from visible and infrared imagery. It will also present background on passive microwave sea ice fields and discuss uncertainties in total sea ice extent estimates.

    To join by ZOOM: 
    From a computer: https://cuboulder.zoom.us/j/5409618610
    Or iPhone one-tap :
    US: +16465588656,,5409618610#
    Or Telephone, Dial(for higher quality, dial a number based on your current location):
    US: 1-646-558-8656 
    Meeting ID: 540 961 8610
    International numbers available: https://cuboulder.zoom.us/zoomconference?m=n9ouFAK_Rco_IPQABq0Xs3hCfONR…