Retrieval of Time-Varying Land Cover Retrieval of Time-Varying Land Cover and Vegetation Properties from and Vegetation Properties from

MODIS in Support of the NCEP-WRF MODIS in Support of the NCEP-WRF Land Surface ModelLand Surface Model

Year 1 Progress ReportYear 1 Progress Report

Mark Friedl, Angela Martin, Bin Tan, Bruce AndersonMark Friedl, Angela Martin, Bin Tan, Bruce Anderson

Department of Geography & EnvironmentDepartment of Geography & Environment

Center for Remote SensingCenter for Remote Sensing

Boston UniversityBoston University

Project OverviewProject Overview

Key ObjectivesKey Objectives

• Provide updated land data sets to NCEP Provide updated land data sets to NCEP for use in Noah land model for use in Noah land model based on based on MODIS land productsMODIS land products suite suite

• Evaluate differences with existing Evaluate differences with existing AVHRR data setsAVHRR data sets

• Assess influence on Noah land model Assess influence on Noah land model performanceperformance

Deliverables: Land CoverDeliverables: Land Cover Global; 1 km; Static; Gap filledGlobal; 1 km; Static; Gap filled SiB/UMd classesSiB/UMd classes Investigating provision of USGS classesInvestigating provision of USGS classes

Current 0.125o land cover used in NLDAS

Deliverables: AlbedoDeliverables: Albedo Global; 1,2 km, 0.05 Degrees; Gap filledGlobal; 1,2 km, 0.05 Degrees; Gap filled 16-day climatology based on 2000-200516-day climatology based on 2000-2005 Black skyBlack sky (beam); White sky (diffuse) (beam); White sky (diffuse)

• Broadband (0.4-3.5);Broadband (0.4-3.5); visible (0.4-0.7); SWIR(0.7-3.5) visible (0.4-0.7); SWIR(0.7-3.5)

0.125o Albedo for June used in NLDAS

Deliverables: Leaf Area IndexDeliverables: Leaf Area Index

GlobalGlobal 1 km1 km Gap filledGap filled 8-day climatology 8-day climatology

based on 2000-2005based on 2000-2005 Scheduled to begin Scheduled to begin

work in Summer 2005work in Summer 2005

Progress to Date: Land CoverProgress to Date: Land Cover

Data Set for UMd/SiB classes mostly completeData Set for UMd/SiB classes mostly complete Currently comparing MODIS LC against existing Currently comparing MODIS LC against existing

NLDAS LC data set from AVHRRNLDAS 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 Deliver final data sets to NCEP by end of year 1 funding

(July 31)(July 31)

Progress to Date: AlbedoProgress to Date: Albedo

Data compilation ongoing: near completionData compilation ongoing: near completion

Data sets includeData sets include• 2 km, 16-day global gap-filled 2 km, 16-day global gap-filled climatologyclimatology for ’00-04 for ’00-04

Courtesy of Eric Moody, Mike King, Crystal Schaaf et alCourtesy 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 valuesIncludes missing values

• Spatially averaged 16-day 0.05 degree CMGSpatially averaged 16-day 0.05 degree CMG

Currently evaluating different data setsCurrently evaluating different data sets

Target: Deliver final data sets to NCEP by end of Target: Deliver final data sets to NCEP by end of year 1 funding (July 31)year 1 funding (July 31)

Sample Results: Land CoverSample Results: Land Cover

NLDAS Land Cover @ 1/8 Degrees

MODIS Land Cover @ 1/8 Degrees

NLDAS vs MODIS Land CoverNLDAS vs MODIS Land Cover

Different Representations/DistributionsDifferent Representations/Distributions

0 2 4 6 8 10 12 14

05

00

10

00

15

00

NLDAS

0 2 4 6 8 10 12 14

05

00

10

00

15

00

20

00

MODIS

Land Cover at 1/8 Degree Land Cover at 1 km

Sample Results: AlbedoSample Results: Albedo 2-Km Average Albedo for June from MODIS2-Km Average Albedo for June from MODIS

Results: AlbedoResults: Albedo 1/8 Degree Average Albedo for June from MODIS1/8 Degree Average Albedo for June from MODIS

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

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

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 2

NLDASMODIS

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 3

NLDASMODIS

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 4

NLDASMODIS

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 6

NLDASMODIS

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

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 7

NLDASMODIS

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 8

NLDASMODIS

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 11

NLDASMODIS

Julian Date

100 150 200 250 300

0.1

00

.15

0.2

00

.25

Mean Albedo - Class 12

NLDASMODIS

Sample Results: Sample Results: AlbedoAlbedo

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

Future Plans/TimelineFuture Plans/Timeline Land coverLand cover

• Finalize SiB land cover database & deliver to NCEP Finalize SiB land cover database & deliver to NCEP summer 2005summer 2005

• Continue work on USGS databaseContinue work on USGS database

AlbedoAlbedo• Continue analysis of MODIS albedo productsContinue analysis of MODIS albedo products

Comparison with existing NCEP datasetsComparison with existing NCEP datasets• Deliver global database summer 2005Deliver global database summer 2005

Leaf Area IndexLeaf 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 Plans to increase effort in this area in Year 2 (starting late

summer 2005)summer 2005)

Modeling analyses Modeling analyses • using Noah model to assess sensitivity of model to land using Noah model to assess sensitivity of model to land

cover, albedo, LAIcover, albedo, LAI