Earth atmospheric science

Earth atmospheric science
Name	Earth atmospheric science
Caption	Schematic of atmospheric layers and major processes
Field	Atmospheric science
Related	Meteorology; Climatology; Remote sensing

Earth atmospheric science Earth atmospheric science is the integrated study of the gaseous envelope surrounding Earth and the processes that govern its composition, structure, dynamics, and interaction with other Earth systems. It synthesizes observations from platforms such as NOAA satellites, research aircraft from NASA, and in situ measurements by institutions like the Scripps Institution of Oceanography to address questions in weather, climate, air quality, and planetary habitability. Practitioners engage with policy-making bodies including the Intergovernmental Panel on Climate Change and international frameworks like the United Nations Framework Convention on Climate Change.

Overview and Composition

Atmospheric composition research traces concentrations of major constituents—nitrogen, Oxygen, argon—as well as trace gases such as Carbon dioxide, Methane, and Ozone using networks like the Global Atmosphere Watch and observatories such as Mauna Loa Observatory. Studies often refer to historical datasets from expeditions like the HMS Challenger expedition and records from ice cores recovered by teams led by Claude Lorius and programs connected to the National Science Foundation. Chemical inventories guide work in institutions such as the World Meteorological Organization and feed into assessment reports by the Intergovernmental Panel on Climate Change.

Atmospheric Structure and Layers

The vertical structure includes the Troposphere, where convection and weather systems form; the Stratosphere, home to the Ozone layer; the Mesosphere and Thermosphere, regions sampled by sounding rockets and missions coordinated with agencies like European Space Agency; and the Exosphere as the uppermost transition to space. Structural studies rely on radiosonde launches from meteorological services such as the Met Office and satellite missions including NOAA-20 and instruments aboard International Space Station expeditions.

Physical Processes and Dynamics

Dynamics combine fluid mechanics from traditions linked to scientists like Vilhelm Bjerknes and theoretical frameworks developed at institutions such as the Princeton University. Key processes include baroclinic instability, jet streams influenced by the Coriolis effect described in classical works associated with Lord Kelvin and later advanced in texts from Massachusetts Institute of Technology. Turbulence, convection, gravity waves, and boundary layer processes are studied in field campaigns such as Project Stormfury and experiments coordinated with the National Center for Atmospheric Research.

Atmospheric Chemistry and Aerosols

Chemical cycles involve photochemistry, heterogeneous reactions on particle surfaces, and radical chemistry illuminated by research from laboratories at California Institute of Technology and Max Planck Institute for Chemistry. Aerosol science examines sources and sinks including volcanic emissions from eruptions like Mount Pinatubo, biomass burning events observed during Amazon rainforest drought studies, and anthropogenic pollution traced to urban centers such as Beijing and Los Angeles. Measurement programs led by organizations like European Centre for Medium-Range Weather Forecasts quantify forcing effects relevant to assessments by the Intergovernmental Panel on Climate Change.

Climate, Weather, and Circulation

Coupled climate dynamics link atmospheric behavior to oceans studied by Woods Hole Oceanographic Institution and modes of variability such as El Niño–Southern Oscillation and the North Atlantic Oscillation. Weather forecasting evolved through innovations from the Royal Meteorological Society and operational centers like ECMWF and National Weather Service, using data assimilation techniques pioneered at Met Office and research from University of Reading. Climate attribution studies often engage collaborations with IPCC authors, national academies such as the National Academy of Sciences, and international programs like World Climate Research Programme.

Human Impacts and Atmospheric Change

Anthropogenic influences center on greenhouse gas emissions from sectors monitored by agencies such as the International Energy Agency and land-use changes documented in studies coordinated with the Food and Agriculture Organization. Ozone depletion research led to policy action under the Montreal Protocol following scientific contributions from investigators like Susan Solomon. Mitigation and adaptation efforts intersect with programs run by the United Nations Environment Programme and national policy bodies including the U.S. Environmental Protection Agency.

Measurement, Observation, and Modeling

Observation systems combine satellite constellations from NOAA, European Space Agency, and JAXA with surface networks like the Global Climate Observing System and aircraft campaigns organized by NCAR and NASA. Numerical modeling is performed with Earth system models developed at centers such as Hadley Centre, GFDL, and NCAR Community Earth System Model and evaluated through intercomparison projects like CMIP6. Remote sensing instruments include spectrometers flown on missions like Aqua (satellite) and lidar campaigns linked to CALIPSO.

Category:Atmospheric sciences