NCAR

Global Modeling of Thermospheric Airglow in the Far-Ultraviolet

 Synthetic ultraviolet global images
Thursday, April 27, 2017

The Global Airglow (GLOW) model has been updated and extended to calculate ultraviolet light emitted by the upper atmosphere, including during the day, the night, and in the aurora.

The NASA Ionospheric Connection Explorer (ICON) Mission

Variation of NmF2 log 10 [1/cm3] for different seasons
Wednesday, April 26, 2017

The NASA Ionospheric Connection explorer (ICON) will study the coupling between the thermosphere and ionosphere at low- and mid-latitudes by measuring the key parameters.

A Study of Large Wind Shears Near the Mesopause and the Tropopause

Vertical profiles of maximum wind shear
Thursday, April 13, 2017

The NCAR Whole Atmosphere Community Climate Model (WACCM), with a quasi-uniform horizontal resolution of $\sim$25km and a vertical resolution of 0.1 scale height, produces large horizontal winds and vertical shears maximizing in the mesosphere and lower thermosphere (MLT), similar to those found

Solar Cycle Variability Induced by Title Angle Scatter in a Babcockl-Leighton Solar Dynamo Model

Variability in sunspot number (SSN) in STABLE dynamo simulations of the solar cycle using the observed random scatter in sunspot pair tilt angle of 15 degrees. (a) 19 magnetic cycles are highlighted with red and blue representing the northern and southern hemispheres respectively. Red shaded areas indicate periods when the SSN in the north exceeds that in the south and blue shaded areas indicate the opposite. (b) Long-term SSN variability in the same simulation, exhibiting extended periods of low and high a
Saturday, April 15, 2017

We present results from a three-dimensional Babcock–Leighton dynamo model that is sustained by the explicit emergence and dispersal of bipolar magnetic regions (BMRs). On average, each BMR has a systematic tilt given by Joy’s law.

Energetic Particle Data for New Research

Delta II rocket launching the fifth GPS IIR(M) satellite

As part of the US National Space Weather Strategy and Action Plan, and following the 2016 Executive Order 13744, the Department of Defense (DoD) is now opening a more than 15-year record of GPS particle data to scientific scrutiny.

Variability and predictability of the space environment as related to lower atmosphere forcing

Monthly mean, globally integrated total gravity wave flux of energy
Tuesday, April 4, 2017

Most of the large events affecting the thermosphere and ionosphere part of the space environment come from the Sun, the solar wind, and Earth’s magnetosphere, but even in “quiet time” periods lacking those sources of variability, conditions in the thermosphere and ionosphere continue to fluctuate

A study of large wind shears near the mesopause and the tropopause

Vertical profiles of maximum wind shear
Friday, March 31, 2017

The NCAR Whole Atmosphere Community Climate Model (WACCM), with a quasi-uniform horizontal resolution of $\sim$25km and a vertical resolution of 0.1 scale height, produces large horizontal winds and vertical shears maximizing in the mesosphere and lower thermosphere (MLT), similar to those found

Driving Solar Giant Cells Through the Self-Organization of Near-Surface Plumes

Global 3D simulations of solar giant-cell convection.
Friday, March 24, 2017

Global 3D simulations of solar giant-cell convection have provided significant insight into the processes which yield the Sun’s observed differential rotation and cyclic dynamo action.

Meridional Circulation Dynamics in a Cyclic Convective Dynamo

Meridional flow variations induced by magnetic cycles.
Friday, March 24, 2017

Surface observations indicate that the speed of the solar meridional circulation in the photosphere varies in anti-phase with the solar cycle.

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