NASA Earth Observatory

GIFs: California Reservoirs From Drought to Deluge

Michael Animation, Data & Graphics, Photo April 20, 2017

A five-year drought in California ended spectacularly this winter, with the state emerging from one of its driest periods on record by enduring one of its wettest. Reservoirs, lakes, and mountainsides are now brimming with water and snow, though scientists caution that the unseen reservoirs—underground aquifers—are a long way from having the same bounty that is visible on the land surface. [Full post on NASA Earth Observatory]

Trinity Lake, the third largest reservoir in the state (after Lake Oroville and Shasta Lake). The artificial lake in northern California connects to the Trinity River and is part of the Sacramento basin. On April 29, 2015, Trinity stood at 59 percent of its historical average level for that date; by April 2, 2017, it stood at 114 percent.

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NO2 & Air Pollution Tracking by NASA

Michael Animation, Data & Graphics, Photo, Video July 15, 2016

空气污染和二氧化氮的监测及趋势(2005 – 2014)

美国宇航局过去十年对全球195个城市的空气污染监测发现,欧美日本等地空气质量有所改善,但中国、印度及中东空气污染面积有所扩大。这里被监测的污染物是二氧化氮,主要来自汽车尾气、发电厂及工业活动的排放。二氧化氮可以很快变成地面层臭氧,是城市中雾霾的主要成分之一。如下图,中国的二氧化氮高浓度覆盖面积扩大最为明显(红色为浓度5000万亿分子/立方厘米):【点这里阅读英文原文

NO2 concentrations in Asia between 2005 and 2014, with the blue indicating 0 and the red indicating 5,000 trillion molecules per cubic centimeters (images: NASA)

NO2 concentrations in Asia between 2005 and 2014, with the blue indicating 0 and the red indicating 5,000 trillion molecules per cubic centimeters; China has witnessed an expansion of high NO2 pollution. [Images: NASA]

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GIFs: Indian Drought Now and Flood 10 Years Ago

Michael Data & Graphics, Interactive, Photo June 17, 2016

India is too hot, literally. This, again, comes from NASA Earth Observatory:

Monsoon rains began arriving across India in early June 2016. For many Indians, it was not a moment too soon. After three underwhelming monsoon seasons, broad swaths of the country have been gripped by drought. An estimated 330 million people have been affected by depleted water supplies.

Of all of India’s reservoirs, Panchet Hill in Jharkhand was among the lowest compared to the 10-year average. In the first week of June 2016, the reservoir stood at 4 percent of capacity; the average for June is 40 percent.

Of all of India’s reservoirs, Panchet Hill in Jharkhand was among the lowest compared to the 10-year average. In the first week of June 2016, the reservoir stood at 4 percent of capacity; the average for June is 40 percent. These two images were taken on June 10, 2015 and June 12, 2016

This is what it looks like at night on June 17, 2016, with much of India hotter than China’s biggest dessert in Xinjiang.

Some parts of India were as hot as 45 degrees Celcius in the evening of June 17, 2016, via earth.nullschool.net

Some parts of India were as hot as 45 degrees Celcius in the evening of June 17, 2016, via earth.nullschool.net

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GIF: Global Temperatures, Dubai Palm Island Building

Michael Data & Graphics, Interactive, Photo, Video May 27, 2016

Month after month, the world’s temperature records have been reset over and over again. And NASA Earth Observatory archive has it all. First one below on the rising temperatures on a global scale over more than a century, decade by decade with latest one of 2005-2014; second one about the first artificial palm island Dubai built on a beachfront.

According to an ongoing temperature analysis conducted by scientists at NASA’s Goddard Institute for Space Studies (GISS), the average global temperature on Earth has increased by about 0.8° Celsius (1.4° Fahrenheit) since 1880. Two-thirds of the warming has occurred since 1975, at a rate of roughly 0.15-0.20°C per decade.

According to an ongoing temperature analysis conducted by scientists at NASA’s Goddard Institute for Space Studies (GISS), the average global temperature on Earth has increased by about 0.8° Celsius (1.4° Fahrenheit) since 1880. Two-thirds of the warming has occurred since 1975, at a rate of roughly 0.15-0.20°C per decade.

 

The first Palm Island constructed was Palm Jumeirah, and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite observed its progress from 2000 to 2011. In these false-color images, bare ground appears brown, vegetation appears red, water appears dark blue, and buildings and paved surfaces appear light blue or gray.

The first Palm Island constructed was Palm Jumeirah, and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite observed its progress from 2000 to 2011.
In these false-color images, bare ground appears brown, vegetation appears red, water appears dark blue, and buildings and paved surfaces appear light blue or gray.

Dubai, in early-morning hours, still registered temperatures in the 30s on May 28, 2016, only cooler than India.

Dubai, in early-morning hours, still registered temperatures in the 30s on May 28, 2016, only cooler than India, via earth.nullschool.net