2002 EARTH SCIENCE VIDEOTAPES |
| |
Tape Title | Record ID | Date Produced | TRT: |
Synopsis |
| MODIS ZEROES IN ON LAND SURFACE TEMPERATURE
| G02-024 | 4/5/02 | 00:05:28 | NASA's Moderate-resolution Imaging Spectroradiometer (MODIS) has a new way of measuring land surface temperature (LST) that could aid farmers around the globe. MODIS zeros in on temperatures directlt at the surface level, instead of six feet above the surface like groundbased observations. The instrument measures temperature from space by detecting thermal radiation emitted from tthe actual surface of the planet. This additional detail means farmers could know the temperature of the air around their cropsand the temperature of the crops themselves-an advantage for estimating productivity and water requirements.
|
TAPE CONTENTS: |
| ITEM (1): Global Data - On clear days, MODIS measures the temperature of nearly every square kilometer (0.4 square miles) of the Earth's surface. On this map of global data, dark green hues represent the coldest temperatures, lightening to blue, red and finally yellow at the highest degrees. MODIS is a valuable tool for scientists around the world as they seek to find better methods for measuring temperature.
Credit: NASA
|
| ITEM (2): Winter Heats Up - MODIS LST observations show that average winter temperatures from December 2001-February 2002 in the contiguous United States were more than 3 degrees C warmer in the daytime and more than 2 degrees C warmer at night than the winter of 2000-01. Actual temperatures are shown in these images, with the warmest areas depicted in yellow and red, and cooler zones shown in blue and dark green.
Credit: NASA
|
| ITEM (3): Warmer Winter - Maps of land surface temperature produced by MODIS confirm earlier National Oceanic and Atmospheric Administration (NOAA) reports that much of the United States was unusually warm and dry this past winter. In this data compiled from November 2001-February 2002, it is easy to see that much of the United States was warmer this year than last. Image one is a daily average and image two is a nightime look at temperature, with warmer areas shown in yellow and red.
Credits: NASA
|
| ITEM (4): MODIS Measures Snow Cover - Monthly MODIS maps showing snow-covered areas from November 2001 to February 2002 show that snow was late to arrive and early to recede in many parts of the country. The red line on each map shows the average snowfall line for the month, the white shows the actual snowfall area. Below average snow can impact public water supplies, encourage drought conditions, and be a catalyst for wildfires.
Credits: NASA
|
| ITEM (5): MODIS Instrument - Serving as a sophisticated thermometer in space, NASA's Moderate Imaging Spectroradiometer (MODIS) is helping Earth scientists advance studies of climate from 437 miles up in the sky.
Credits: NASA
|
| ITEM (6): TERRA Spacecraft - Launched December 18, 1999, NASA's Terra Satellite is the flagship of the Earth Observing System series of satellites, part of NASA's Earth Science Enterprises, a long-term research program dedicated to understanding how human-induced and natural changes affect our global environment.
Credits: NASA
|