HAO

NCAR High Altitude Observatory

Analysis and Hindcast Experiments of the 2009 Sudden Stratospheric Warming in WACCMX+DART

Total electron content (TEC)
Thursday, December 7, 2017

Plain Language Summary or Abstract: Whole atmosphere models offer the opportunity to improve specification and forecasting of the upper atmosphere through incorporating the effects of forcing from both the lower atmosphere as well as the Sun.

What causes the "seasons" in space weather?

Oscillation between differential rotation kinetic energy (solid red curve) and perturbation Rossby waves kinetic energy (red dashed curve)

It is widely known that the Sun has 'spots'--dark areas on its surface that are well known to contain strong magnetic fields, much stronger than the Earth's field. The number of spots seen on the Sun waxes and wanes with a period of roughly eleven years, the 'solar cycle'.

Evidence of the Lower Thermospheric Winter to- Summer Circulation From SABER CO2

SD-WACCM mean fields
Thursday, November 2, 2017

Numerical studies have shown that there is a lower thermospheric winter-to-summer circulation that is driven by wave dissipation and that it plays a significant role in trace gas distributions in the mesosphere and lower thermosphere, and in the composition of the thermosphere.

Rosetta Stone Eclipse Campaign

(Right to left) FLIR camera, PolarCam, and Avantes flash spectra

HAO scientists observed the August 21st total eclipse with a suite of three instruments with financial assistance provided by NASA.

UProcure Authorization Flow

Shopping:  Anybody in HAO can be a shopper.  After shopping must assign a Requisitioner:

Wenbin Wang

Dr. Wenbin Wang is a Project Scientist III in the High Altitude Observatory of the National Center for Atmospheric Research.

An Observationally Constrained 3D Model

Carrington rotation 1775
Tuesday, October 24, 2017

A 3D Potential-Field Source-Surface Model for the Evolution of Longitude-Dependent Coronal Structures: We explore a complementary approach to traditional magnetogram-based coronal field solutions.

A TRMM/GPM retrieval of the total mean generator current for the global electric circuit

Global mean distribution of Wilson current for the GEC (1.6 kA total)
Monday, October 16, 2017

A specialized satellite version of the passive microwave electric field retrieval algorithm (Peterson et al., 2015) is applied to observations from the Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Measurement (GPM) satellites to estimate the generator current for the Global

Nature of Grand Minima and Maxima from Fully Non-Linear Flux-Transport Dynamos

Identified Grand Minima and Maxima
Thursday, September 7, 2017

We aim to investigate the nature and occurrence characteristics of grand solar minimum and maximum periods, which are observed in the solar proxy records such as 10Be and 14C, using a fully non-linear Babcock-Leighton type flux transport dynamo including momentum and entropy equations.

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