|
|
Haze over China
| Title |
Haze over China |
| Description |
Thick haze collected over the Beijing region in late March 2007. Earlier that month, the BBC News reported that an international team of scientists had documented how increasing pollution in China led to decreasing rainfall over the region. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] flying onboard the Aqua [ http://aqua.nasa.gov ] satellite captured these images of the Beijing region on March 22, 2007. The top image is a "true-color" picture, similar to a digital photo. The bottom, "false-color," image uses a combination of visible and infrared light to more clearly show vegetation, water, and clouds. Even sparse vegetation appears bright green, while water appears deep blue (bright blue when tinged with sediment). Clouds dominated by water droplets appear white, while clouds made of ice crystals appear light blue. The false-color image highlights water bodies, perhaps aqua-culture ponds, that are all but invisible in the true-color image, especially along the shores of the Bo Hai. While vegetation and water show up more clearly in the false-color image, haze is much more transparent. Although dingy gray haze dominates the true-color picture, it is all but invisible in the false-color view. The haze "disappears" in the infrared-enhanced image because tiny haze particles do not reflect longer-wavelength infrared light very well, making this type of image useful for distinguishing haze from clouds. The bank of clouds in the upper right corner shows up clearly in both pictures. As China industrializes, factories, power plants, and automobiles all contribute to pollution in the region. In examining pollutants and rainfall, the team of scientists examined records covering more than 50 years, concluding that pollution decreased precipitation at Mount Hua near Xi'an in central China. They concluded that when conditions are so hazy that visibility is reduced to less than 8 kilometers (5 miles), hilly precipitation can drop by 30 to 50 percent. When moist air passes over mountains, it usually cools and forms raindrops, but heavy pollutant concentrations cause the clouds to hang on to their moisture. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 ] of this region. |
|
Haze over China
| Title |
Haze over China |
| Description |
Thick haze collected over the Beijing region in late March 2007. Earlier that month, the BBC News reported that an international team of scientists had documented how increasing pollution in China led to decreasing rainfall over the region. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] flying onboard the Aqua [ http://aqua.nasa.gov ] satellite captured these images of the Beijing region on March 22, 2007. The top image is a "true-color" picture, similar to a digital photo. The bottom, "false-color," image uses a combination of visible and infrared light to more clearly show vegetation, water, and clouds. Even sparse vegetation appears bright green, while water appears deep blue (bright blue when tinged with sediment). Clouds dominated by water droplets appear white, while clouds made of ice crystals appear light blue. The false-color image highlights water bodies, perhaps aqua-culture ponds, that are all but invisible in the true-color image, especially along the shores of the Bo Hai. While vegetation and water show up more clearly in the false-color image, haze is much more transparent. Although dingy gray haze dominates the true-color picture, it is all but invisible in the false-color view. The haze "disappears" in the infrared-enhanced image because tiny haze particles do not reflect longer-wavelength infrared light very well, making this type of image useful for distinguishing haze from clouds. The bank of clouds in the upper right corner shows up clearly in both pictures. As China industrializes, factories, power plants, and automobiles all contribute to pollution in the region. In examining pollutants and rainfall, the team of scientists examined records covering more than 50 years, concluding that pollution decreased precipitation at Mount Hua near Xi'an in central China. They concluded that when conditions are so hazy that visibility is reduced to less than 8 kilometers (5 miles), hilly precipitation can drop by 30 to 50 percent. When moist air passes over mountains, it usually cools and forms raindrops, but heavy pollutant concentrations cause the clouds to hang on to their moisture. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 ] of this region. |
|
Haze over China
| Title |
Haze over China |
| Description |
Thick haze collected over the Beijing region in late March 2007. Earlier that month, the BBC News reported that an international team of scientists had documented how increasing pollution in China led to decreasing rainfall over the region. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] flying onboard the Aqua [ http://aqua.nasa.gov ] satellite captured these images of the Beijing region on March 22, 2007. The top image is a "true-color" picture, similar to a digital photo. The bottom, "false-color," image uses a combination of visible and infrared light to more clearly show vegetation, water, and clouds. Even sparse vegetation appears bright green, while water appears deep blue (bright blue when tinged with sediment). Clouds dominated by water droplets appear white, while clouds made of ice crystals appear light blue. The false-color image highlights water bodies, perhaps aqua-culture ponds, that are all but invisible in the true-color image, especially along the shores of the Bo Hai. While vegetation and water show up more clearly in the false-color image, haze is much more transparent. Although dingy gray haze dominates the true-color picture, it is all but invisible in the false-color view. The haze "disappears" in the infrared-enhanced image because tiny haze particles do not reflect longer-wavelength infrared light very well, making this type of image useful for distinguishing haze from clouds. The bank of clouds in the upper right corner shows up clearly in both pictures. As China industrializes, factories, power plants, and automobiles all contribute to pollution in the region. In examining pollutants and rainfall, the team of scientists examined records covering more than 50 years, concluding that pollution decreased precipitation at Mount Hua near Xi'an in central China. They concluded that when conditions are so hazy that visibility is reduced to less than 8 kilometers (5 miles), hilly precipitation can drop by 30 to 50 percent. When moist air passes over mountains, it usually cools and forms raindrops, but heavy pollutant concentrations cause the clouds to hang on to their moisture. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 ] of this region. |
|
Haze over China
| Title |
Haze over China |
| Description |
Just days after thick haze [ http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17591 ] collected over the Beijing region, more haze clouded the skies over Bo Hai, east of the capital city. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] flying onboard the Terra [ http://terra.nasa.gov ] satellite captured these images of Bo Hai on March 26, 2007. The top image is a "true-color" picture, similar to a digital photo. The bottom image is a "false-color" picture that uses a combination of visible and infrared light to give a clearer picture of vegetation, water, and clouds. Besides clearly showing vegetation, water, and clouds, the false-color image, when paired with a true-color image, helps the viewer discern haze. In the top image, thick haze dominates the image, but the same haze barely appears in the bottom image. The pollutants comprising most of the haze have little water content, rendering them largely invisible in the false-color picture. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 ] of this region. |
|
Haze over China
| Title |
Haze over China |
| Description |
Just days after thick haze [ http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17591 ] collected over the Beijing region, more haze clouded the skies over Bo Hai, east of the capital city. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] flying onboard the Terra [ http://terra.nasa.gov ] satellite captured these images of Bo Hai on March 26, 2007. The top image is a "true-color" picture, similar to a digital photo. The bottom image is a "false-color" picture that uses a combination of visible and infrared light to give a clearer picture of vegetation, water, and clouds. Besides clearly showing vegetation, water, and clouds, the false-color image, when paired with a true-color image, helps the viewer discern haze. In the top image, thick haze dominates the image, but the same haze barely appears in the bottom image. The pollutants comprising most of the haze have little water content, rendering them largely invisible in the false-color picture. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 ] of this region. |
|
Haze over China
| Title |
Haze over China |
| Description |
Just days after thick haze [ http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17591 ] collected over the Beijing region, more haze clouded the skies over Bo Hai, east of the capital city. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] flying onboard the Terra [ http://terra.nasa.gov ] satellite captured these images of Bo Hai on March 26, 2007. The top image is a "true-color" picture, similar to a digital photo. The bottom image is a "false-color" picture that uses a combination of visible and infrared light to give a clearer picture of vegetation, water, and clouds. Besides clearly showing vegetation, water, and clouds, the false-color image, when paired with a true-color image, helps the viewer discern haze. In the top image, thick haze dominates the image, but the same haze barely appears in the bottom image. The pollutants comprising most of the haze have little water content, rendering them largely invisible in the false-color picture. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 ] of this region. |
|
Haze over Eastern China
| Title |
Haze over Eastern China |
| Description |
One day after a thick plume of haze crept toward Beijing, much of eastern China was obscured on October 23, 2007. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] on NASA's Aqua [ http://aqua.nasa.gov ] satellite took this picture the same day, showing haze dense enough to completely block the view of the land surface below. As on the previous day, the haze largely avoided the Taihang Shan Mountains southwest of the capital city, although fingers of haze crept westward toward the peaks. Thick haze spread from Beijing southward, well past the coast of the Yellow Sea. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 ] of this region. |
|
Haze in Eastern China: Natur
…
nasa, nasanaturalhazards
* eoimages.gsfc.nasa.gov/ima
…
beijing_amo_2007365
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-12-31 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
beijing_amo_2007365 |
|
Air Quality and Weather in B
…
nasa, nasaimageofthedaygalle
…
In preparation for hosting t
…
ge_08364
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-12-28 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
ge_08364 |
|
Air Quality and Weather in B
…
nasa, nasaimageofthedaygalle
…
In preparation for hosting t
…
ge_08364
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-12-28 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
ge_08364 |
|
Air Quality and Weather in B
…
nasa, nasaimageofthedaygalle
…
In preparation for hosting t
…
ge_08364
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-12-28 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
ge_08364 |
|
Air Quality and Weather in B
…
nasa, nasaimageofthedaygalle
…
In preparation for hosting t
…
ge_08364
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-12-28 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
ge_08364 |
|
Haze over Beijing: Image of
…
nasa, nasaimageofthedaygalle
…
Thick haze collected over th
…
ge_07518
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-03-22 |
| creator |
NASA -- NASA image courtesy the rapidfire.sci.gsfc.nasa.gov MODIS Rapid Response Team at NASA GSFC. The Rapid Response Team provides rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 daily images of this region. |
| identifier |
ge_07518 |
|
Haze over Beijing: Image of
…
nasa, nasaimageofthedaygalle
…
Thick haze collected over th
…
ge_07518
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-03-22 |
| creator |
NASA -- NASA image courtesy the rapidfire.sci.gsfc.nasa.gov MODIS Rapid Response Team at NASA GSFC. The Rapid Response Team provides rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 daily images of this region. |
| identifier |
ge_07518 |
|
Haze over Beijing: Image of
…
nasa, nasaimageofthedaygalle
…
Thick haze collected over th
…
ge_07518
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-03-22 |
| creator |
NASA -- NASA image courtesy the rapidfire.sci.gsfc.nasa.gov MODIS Rapid Response Team at NASA GSFC. The Rapid Response Team provides rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 daily images of this region. |
| identifier |
ge_07518 |
|
Haze over Beijing: Image of
…
nasa, nasaimageofthedaygalle
…
Thick haze collected over th
…
ge_07518
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-03-22 |
| creator |
NASA -- NASA image courtesy the rapidfire.sci.gsfc.nasa.gov MODIS Rapid Response Team at NASA GSFC. The Rapid Response Team provides rapidfire.sci.gsfc.nasa.gov/subsets/?FAS_China4 daily images of this region. |
| identifier |
ge_07518 |
|
Haze over China: Natural Haz
…
nasa, nasanaturalhazards
* eoimages.gsfc.nasa.gov/ima
…
china_amo_2007081
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-03-22 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
china_amo_2007081 |
|
|
