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The runoff from the land flows into streams and rivers and discharges into the ocean, which completes the global cycle. [5] The water cycle is a key part of Earth's energy cycle through the evaporative cooling at the surface which provides latent heat to the atmosphere, as atmospheric systems play a primary role in moving heat upward. [5]
The global ocean is Earth's largest thermal reservoir that functions to regulate the planet's climate; acting as both a sink and a source of energy. [3] The ocean's thermal inertia delays some global warming for decades or centuries. It is accounted for in global climate models, and has been confirmed via measurements of ocean heat content.
Phase I (1990–2002), also called the "Build-Up Phase", was designed to determine the hydrological cycle and energy fluxes by means of global measurements of atmospheric and surface properties. GEWEX was also designed to model the global hydrological cycle and its impact on the atmosphere, oceans and land surfaces.
Humanity has thrown the global water cycle off balance “for the first time in ... global warming. In turn, climate change-fueled heat is drying out landscapes, reducing moisture and increasing ...
Loss of sea ice increases heat in the Arctic, where temperatures have risen about four times the global average, according to NASA. From 2023 to early 2024, global ocean temperatures hit record ...
The runoff from the land flows into streams and rivers and discharges into the ocean, which completes the global cycle. [26] The water cycle is a key part of Earth's energy cycle through the evaporative cooling at the surface which provides latent heat to the atmosphere, as atmospheric systems play a primary role in moving heat upward. [26]
Publicity has surrounded claims of a global warming hiatus during the period 1998–2013. The exceptionally warm El Niño year of 1998 was an outlier from the continuing temperature trend, and so subsequent annual temperatures gave the appearance of a hiatus: by January 2006, it appeared to some that global warming had stopped or paused. [2]
Ward and Brownlee predict that there will be two variations of the future warming feedback: the "moist greenhouse" in which water vapor dominates the troposphere and starts to accumulate in the stratosphere and the "runaway greenhouse" in which water vapor becomes a dominant component of the atmosphere such that the Earth starts to undergo ...