Attribution science database. An updating database of studies that find the fingerprint of human-caused climate change on observed trends and events. About us. Air Mass Temperature Increase Air temperature and the amount of moisture the air can hold increase alongside global temperature. Oct 25, The sea is rising faster now than any time in the last 3, years, experts say, slowly swallowing the Texas Gulf Coast.
Jul 2, Mesonet. Nov 11, Nature. Climate science at a glance Humans are the primary external influence on air temperature. Warmer air can hold more water increasing the risk of extreme precipitation events. Background information Global warming affects the interaction between the air and ocean The air and ocean are two major vessels of heat energy and moisture in the climate system.
The second is that the long-term average global temperature is rising. See references. Air Temperature Rising air temperatures bring heat waves, spread disease, shift plant and animal habitat and cause extreme weather events, from drought to blizzards. Expanding air cools, which forces it to lose its moisture as rain or snow.
The opposite is true for sinking air. Such air compresses and warms. In a zone of high pressure like this, moisture is absorbed by the air from its surroundings. Water is an enormously efficient heat-sink. In fact, the past five years have been the warmest five years in centuries.
A couple of degrees may not seem like much. However, this change can have big impacts on the health of Earth's plants and animals. We know what Earth's past climate was like by studying things that have been around for a long time. For example, scientists can study what Earth's climate was like hundreds of years ago by studying the insides of trees that have been alive since then.
But if scientists want to know what Earth's climate was like hundreds of thousands to millions of years ago, they study sediment cores and ice cores. Sediment cores come from the bottoms of lakes or the ocean floor.
Ice cores are drilled from deep — sometimes miles — below the surface of the ice in places like Antarctica. A drilled ice core kind of looks like what you get if you plunge a drinking straw into a slushy drink and pull it out with your finger over the end of the straw. The layers in an ice core are frozen solid. These layers of ice give clues about every year of Earth's history back to the time the deepest layer was formed.
The ice contains bubbles of the air from each year. Scientists analyze the bubbles in each layer to see how much CO 2 they contain. Each layer in an ice core tells scientists something about Earth's past.
0コメント