Introduction to Land Information System LIS Dr Jing

Introduction to Land Information System (LIS) Dr. Jing Zeng Department of Earth and Atmospheric Sciences Nov 25, 2014

Outline • 1. Introduction • 2. Basic Models • 3. Model test example

1. Introduction – why we need land surface model • Land covers 30% of the Earth’s surface • Shelter for human beings • Storage of freshwater (essential for human life) • Greater variability of weather above land than oceans

Outline • 1. Introduction • 2. Basic Models

About LIS – the physics Inputs Topography, Soils Physics Land Surface Models Land Cover, Vegetation Properties Soil Moisture & Temperature Evaporation Sensible Heat Flux Applications Weather/ Climate Water Resources Homeland Security Meteorological Forecasts, Analyses, and/or Observations Snow Soil Moisture Temperature Outputs Runoff Data Assimilation Modules Snowpack Properties Military Ops Natural Hazards

LIS software architecture Driver layer Abstractions layer Model layer

Outline • 1. Introduction • 2. Basic Models • 3. Test Example

Simulation of land surface properties • Land surface model: Noah • Forcing data: NLDAS (1/8 th-degree grid spacing ) • Year: 2005~2006

Soil moisture variation at NE

Variation of soil temperature and soil moisture

1 m depth soil moisture and temperature variation

Variation of land surface sensible and latent heat flux