Earth from Space - Image Information


LOCATION Direction Photo #: ISS032-E-24687 Date: Sep. 2012
Geographic Region: USA-IDAHO
Feature: SALMON R. MTS., BOISE, HALSTEAD FIRES, MUSTANG FIRES, SALMON R.


IMAGE
 
Idaho Fires, September 2012

Taken with a short lens (45 mm), this west-looking astronaut photograph has a field of view covering much of the forested region of central Idaho. The dark areas are all wooded mountains--the Salmon River Mts. (image left), Bitterroot Mts. (image lower right) and Clearwater Mts. (image right). All three areas experienced wildfires in September 2012--this image illustrates the situation early in the month. Smaller fire 'complexes" appear as tendrils of smoke near the sources (e.g. Halstead complex image left), and as major white smoke plumes from the Mustang fire complex in the densest forests (darkest green, image center) of the Clearwater Mts. This was the largest plume noted in the region with thick smoke blowing eastward over the Beaverhead Mts at image bottom.

The linear shape of the smoke plumes gives a sense of the generally eastward smoke transport on this day in early September. The smoke distribution shows another kind of transport: at night, when winds are weak, cooling of the atmosphere near the ground causes drainage of cooled (denser) air down into the major valleys. Here the smoke can be seen flowing west down into the narrow Salmon and Lochsa River valleys (at a local time of 12:18:50 PM)--in the opposite direction to the higher winds and the thick smoke masses.

The bright yellow-tan areas at image top left and top right contrasting with the mountains are grasslands of the Snake River in southern Idaho around Boise, and the Palouse region in western Idaho-SE Washington state. This latter area is known to ecologists as the Palouse Grasslands Ecoregion. Light green areas visible in the center of many of the valleys are agricultural crops including barley, alfalfa, and wheat.

The image also shows several firsts of which Idaho can boast. The Snake River between Boise and the Palouse region has cut Hells Canyon (image top), the deepest gorge in the US at almost 2436 meters (8000 feet). The largest single wilderness area in the contiguous US, the Frank Church-River of No Return Wilderness occupies the wooded zones of the Salmon River Mts and the Clearwater Mts., i.e. most of the area shown in the middle of the image. Idaho's highest peak is Borah Peak (image lower left) at 3860 meters above sea level (12,662 feet asl). The Continental Divide cuts through the bottom of the image--rivers on the eastern slopes of the Beaverhead Mts drain to the Atlantic Ocean, whereas rivers in the rest of the area drain to the Pacific Ocean.


Images: All Available Images Low-Resolution 312k
Mission: ISS032  
Roll - Frame: E - 24687
Geographical Name: USA-IDAHO  
Features: SALMON R. MTS., BOISE, HALSTEAD FIRES, MUSTANG FIRES, SALMON R.  
Center Lat x Lon: 44.5N x 115W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 10
 
Camera:: N5
 
Camera Tilt: HO   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 45  
 
Nadir to Photo Center Direction: W   The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?:   Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number:  
 
Date: 20120903   YYYYMMDD
Time: 181850   GMT HHMMSS
Nadir Lat: 47.1N  
Latitude of suborbital point of spacecraft
Nadir Lon: 109.6W  
Longitude of suborbital point of spacecraft
Sun Azimuth: 158   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 217   nautical miles
Sun Elevation: 48   Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:  
Water Views: RIVER  
Atmosphere Views: PLUME, SMOKE  
Man Made Views:  
City Views: BOISE, WASHINGTON  

Photo is not associated with any sequences


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