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Retrieval of Time-Varying Land Cover and Vegetation Properties from MODIS in Support of the NCEP- WRF Land Surface Model Year 1 Progress Report Mark Friedl,

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Presentation on theme: "Retrieval of Time-Varying Land Cover and Vegetation Properties from MODIS in Support of the NCEP- WRF Land Surface Model Year 1 Progress Report Mark Friedl,"— Presentation transcript:

1 Retrieval of Time-Varying Land Cover and Vegetation Properties from MODIS in Support of the NCEP- WRF Land Surface Model Year 1 Progress Report Mark Friedl, Angela Martin, Bin Tan, Bruce Anderson Department of Geography & Environment Center for Remote Sensing Boston University

2 Project Overview Key Objectives Key Objectives Provide updated land data sets to NCEPProvide updated land data sets to NCEP for use in Noah land model for use in Noah land model based on MODIS land products suite based on MODIS land products suite Evaluate differences with existing AVHRR data setsEvaluate differences with existing AVHRR data sets Assess influence on Noah land model performanceAssess influence on Noah land model performance

3 Deliverables: Land Cover Deliverables: Land Cover Global; 1 km; Static; Gap filled Global; 1 km; Static; Gap filled SiB/UMd classes SiB/UMd classes Investigating provision of USGS classes Investigating provision of USGS classes Current 0.125 o land cover used in NLDAS

4 Deliverables: Albedo Global; 1,2 km, 0.05 Degrees; Gap filled Global; 1,2 km, 0.05 Degrees; Gap filled 16-day climatology based on 2000-2005 16-day climatology based on 2000-2005 Black sky (beam); White sky (diffuse) Black sky (beam); White sky (diffuse) Broadband (0.4-3.5); visible (0.4-0.7); SWIR(0.7-3.5)Broadband (0.4-3.5); visible (0.4-0.7); SWIR(0.7-3.5) 0.125 o Albedo for June used in NLDAS

5 Deliverables: Leaf Area Index Global Global 1 km 1 km Gap filled Gap filled 8-day climatology based on 2000-2005 8-day climatology based on 2000-2005 Scheduled to begin work in Summer 2005 Scheduled to begin work in Summer 2005

6 Progress to Date: Land Cover Data Set for UMd/SiB classes mostly complete Data Set for UMd/SiB classes mostly complete Currently comparing MODIS LC against existing NLDAS LC data set from AVHRR Currently comparing MODIS LC against existing NLDAS LC data set from AVHRR Require: Require: NCEP global land cover data set for comparisonNCEP global land cover data set for comparison Feedback regarding semantics of class definitionsFeedback regarding semantics of class definitions e.g.: “groundcover” = grassland; tundra class?e.g.: “groundcover” = grassland; tundra class? Target: Target: Deliver final data sets to NCEP by end of year 1 funding (July 31)Deliver final data sets to NCEP by end of year 1 funding (July 31)

7 Progress to Date: Albedo Data compilation ongoing: near completion Data compilation ongoing: near completion Data sets include Data sets include 2 km, 16-day global gap-filled climatology for ’00-042 km, 16-day global gap-filled climatology for ’00-04 Courtesy of Eric Moody, Mike King, Crystal Schaaf et al Courtesy of Eric Moody, Mike King, Crystal Schaaf et al Waiting for spectral/white sky data sets (end of April) Waiting for spectral/white sky data sets (end of April) 1 km, 16-day global from original product1 km, 16-day global from original product Includes missing values Includes missing values Spatially averaged 16-day 0.05 degree CMGSpatially averaged 16-day 0.05 degree CMG Currently evaluating different data sets Currently evaluating different data sets Target: Deliver final data sets to NCEP by end of year 1 funding (July 31) Target: Deliver final data sets to NCEP by end of year 1 funding (July 31)

8 Sample Results: Land Cover NLDAS Land Cover @ 1/8 Degrees MODIS Land Cover @ 1/8 Degrees

9 NLDAS vs MODIS Land Cover Different Representations/Distributions Land Cover at 1/8 Degree Land Cover at 1 km

10 Sample Results: Albedo 2-Km Average Albedo for June from MODIS 2-Km Average Albedo for June from MODIS

11 Results: Albedo 1/8 Degree Average Albedo for June from MODIS 1/8 Degree Average Albedo for June from MODIS

12 Sample Results: Albedo 1/8 Degree NLDAS Albedo for June 1/8 Degree NLDAS Albedo for June

13 Sample Results: Albedo Comparison between NLDAS albedo and MODIS at 1/8 degree Comparison between NLDAS albedo and MODIS at 1/8 degree

14 Sample Results: Albedo Comparison between NLDAS albedo and MODIS at 1/8 degree Comparison between NLDAS albedo and MODIS at 1/8 degree

15 Sample Results: Albedo Comparison bwtn 1 km MODIS albedo and 1/8 degree NLDAS albedo NLDAS Albedo has positive bias and reduced dynamic range relative to MODIS albedo

16 Future Plans/Timeline Land cover Land cover Finalize SiB land cover database & deliver to NCEP summer 2005Finalize SiB land cover database & deliver to NCEP summer 2005 Continue work on USGS databaseContinue work on USGS database Albedo Albedo Continue analysis of MODIS albedo productsContinue analysis of MODIS albedo products Comparison with existing NCEP datasets Comparison with existing NCEP datasets Deliver global database summer 2005Deliver global database summer 2005 Leaf Area Index Leaf Area Index Initial dataset compilation has been initiatedInitial dataset compilation has been initiated Plans to increase effort in this area in Year 2 (starting late summer 2005)Plans to increase effort in this area in Year 2 (starting late summer 2005) Modeling analyses Modeling analyses using Noah model to assess sensitivity of model to land cover, albedo, LAIusing Noah model to assess sensitivity of model to land cover, albedo, LAI

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