12 056 resources found

Ching and Carter (1974) reported an equatorial bugle of midnight mass density at about 230 km on the basis of ion gauge measurements in April 1972. However, since then few...

An algorithm is described for inverting individual particle properties from statistics of ensemble observations, thereby dispelling the notion that coincident particles create...

This study presents a new formulation for the norms and scalar products used in tangent linear or adjoint models to determine forecast errors and sensitivity to observations and...

In this paper, an ionospheric electron density reanalysis algorithm was used to generate global optimized electron density during the 17-18 March 2013 geomagnetic storm by...

A new approach is described for calculating the mass (m) and terminal velocity (Vt) of ice particles from airborne and balloon-borne imaging probe data as well as its...

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Constellations of driftsonde systems— gondolas floating in the stratosphere and able to release dropsondes upon command— have so far been used in three major field...

Ozone (O-3) is an important secondary pollutant that impacts air quality and human health. Eastern Asia has high regional O-3 background due to the numerous sources and...

More than 3 decades after the discovery of the ozone hole, the processes involved in its formation are believed to be understood in great detail. Current state-of the-art models...

Methanol retrievals from nadir-viewing space-based sensors offer powerful new information for quantifying methanol emissions on a global scale. Here we apply an ensemble of...

The Atmospheric Imaging Assembly (AIA; Lemen et al., 2012) instrument onboard the NASA Solar Dynamics Observatory (SDO; Pesnell et al., 2012) spacecraft has observed the...

We investigate the effects of the evolutionary processes in the internal magnetic structure of two interplanetary coronal mass ejections (ICMEs) detected in situ between 2020...

As observations and atmospheric reanalyses have improved, the diagnostics that can be computed with confidence also increase. Accordingly, a new formulation of the energetics of...

Idealized two-dimensional model simulations are performed to study the frequent nocturnal occurrence of downslope-windstorm-type flows in Arizona's Meteor Crater. The model...

The high correlation between the canopy stomatal uptake and ozone deposition velocity is found to be strongly dominated by their diurnal variations. By averaging observed...

This study compares the distribution of surface climate trends over the Southern Ocean in austral summer between 1979-2011 and 1950-1978, using a wide variety of data sets...

The South Asian summer monsoon supplies over 80% of India's precipitation. Industrialization over the past few decades has resulted in severe aerosol pollution in India....

Urban regions emit a large fraction of anthropogenic emissions of greenhouse gases (GHG) such as carbon dioxide (CO2) and methane (CH4) that contribute to modern-day climate...

The representation of the semi‐annual oscillation (SAO) in climate models shows a common easterly bias of several tens of metres per second compared to observations. These...

Positive precipitation biases over western North America have remained a pervasive problem in the current generation of coupled global climate models. These biases are...