How is Modis LAI calculated?

How is Modis LAI calculated?

MODIS Leaf Area Index/FPAR LAI is defined as the one-sided green leaf area per unit ground area in broadleaf canopies and as half the total needle surface area per unit ground area in coniferous canopies.

What is leaf area index?

Leaf area index is defined as the projected area of leaves over a unit of land (m2 m−2), so one unit of LAI is equivalent to 10,000 m2 of leaf area per hectare.

What is a monthly leaf index?

For example, a leaf area index of 1 means the area is entirely covered by one layer of leaves. These maps show monthly leaf area index from February 2000 to the present, produced using data collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard NASA’s Terra satellite.

How do I download Modis?

How to Download MODIS data

1. Step 1: Define Your Study Area (AOI)
2. Step 2: Define the Data That You Want to Download.
3. Step 3: Define Selection Criteria.
4. Step 4: View Results & Select Data to Order / Download.
5. Step 5: Download Your Data.

What is the difference between leaf area and leaf area index?

The definition “half the total leaf area per unit horizontal ground surface area” is suitable for all kinds of leaves and flat or sloping surfaces. A leaf area index (LAI) expresses the leaf area per unit ground or trunk surface area of a plant and is commonly used as an indicator of the growth rate of a plant.

How do you find the leaf area index?

Leaf area index (LAI) is a measurement of development of canopy at a given time. It can be quantified by the formula LAI= [Leaf area (m2)/Ground cover (m2)].

What is the difference between leaf area and Leaf Area Index?

How do you calculate leaf index?

Thus from the weight values the area of leaf can be easily calculated. Leaf area index (LAI) is a measurement of development of canopy at a given time. It can be quantified by the formula LAI= [Leaf area (m2)/Ground cover (m2)].

Why is LAI important?

Importance. The leaf area index (LAI) is an important parameter in plant ecology. Because it tells how much foliage there is, it is a measure of the photosynthetic active area, and at the same time of the area subjected to transpiration. It is also the area which becomes in contact with air pollutants.

Which is better Erectophile and Planophile?

Planophile leaves (horizontally oriented) capture light with a higher efficiency than erectophile leaves (vertically oriented). In mixed canopies, apart from leaf area index and light absorption characteristics, plant height is an important factor in the distribution of light over the competing species.

What is the leaf area index?

It is the first in a series of images over the continental U.S. produced by the MODIS Land Discipline Group (refer to this site June 2 & 5 for the next two images in the series). The image is a MODIS data product called “Leaf Area Index,” which is produced by radiometrically measuring the visible and near infrared energy reflected by vegetation.

Where can I find the MODIS leaf area index/fpar products?

All of the MODIS Leaf Area Index/FPAR Products can be found at the LP DAAC Web website.

What is the level-4 MODIS product?

The Level-4 MODIS global Leaf Area Index (LAI) and Fraction of Photosynthetically Active Radiation (FPAR) product is a 8-day 500-meter resolution product on a Sinusoidal grid. Science Data Sets provided in the MOD15A2H include LAI, FPAR, a quality rating, and standard deviation for each variable.

What is Lai and fpar in plants?

LAI is defined as the one-sided green leaf area per unit ground area in broadleaf canopies and as half the total needle surface area per unit ground area in coniferous canopies. FPAR is the fraction of photosynthetically active radiation (400-700 nm) absorbed by green vegetation.