# Presentation: 228353

## 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

## Project Overview

- Key Objectives
- Provide updated land data sets to NCEP
- for use in Noah land model
- based on _MODIS land products_ suite
- Evaluate differences with existing AVHRR data sets
- Assess influence on Noah land model performance

##  Deliverables: Land Cover

- Global; 1 km; Static; Gap filled
- SiB/UMd classes
- Investigating provision of USGS classes

*Current 0.125**o** land cover used in NLDAS*

## Deliverables: Albedo

- Global; 1,2 km, 0.05 Degrees; Gap filled
- 16-day climatology based on 2000-2005
- _Black sky_ (beam); White sky (diffuse)
- _Broadband (0.4-3.5);_ visible (0.4-0.7); SWIR(0.7-3.5)

*0.125**o*  *Albedo for June used in NLDAS*

## Deliverables: Leaf Area Index

- Global
- 1 km
- Gap filled
- 8-day climatology based on 2000-2005
- Scheduled to begin work in Summer 2005

## Progress to Date: Land Cover

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

## Progress to Date: Albedo

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

## Sample Results: Land Cover

- NLDAS Land Cover @ 1/8 Degrees

- MODIS Land Cover @ 1/8 Degrees

## NLDAS vs MODIS Land Cover

- Different Representations/Distributions

- Land Cover at 1/8 Degree

- Land Cover at 1 km

## Sample Results: Albedo

- 2-Km Average Albedo for June from MODIS

## Results: Albedo

- 1/8 Degree Average Albedo for June from MODIS

## Sample Results: Albedo

- 1/8 Degree NLDAS Albedo for June

## Sample Results: Albedo

- Comparison between NLDAS albedo and MODIS at 1/8 degree

## Sample Results: Albedo

- Comparison between NLDAS albedo and MODIS at 1/8 degree

## 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

## Future Plans/Timeline

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