Global Atmospheric Technologies and Sciences, Inc.

Recent Studies Indicate That the Occurrence and Brightness of Polar Mesospheric Clouds (PMCS) Diminish Following Enhanced Planetary Rossby Wave (PRW) Activity and Warm Winter Stratospheric Temperature Anomalies. Theoretical Investigations Into the Cause of This Apparent Teleconnection Have Targeted the Response of the Gravity Wave (gw)-driven Mesospheric Circulation to Enhanced PRW Forcing in the Winter Stratosphere. However It Is Known That the Mesospheric 2-DAY Wave Was Also Enhanced During Seasons of Increased PRW Activity and Reduced PMC Brightness. Momentum Deposition by Dissipating 2-DAY Waves Drives a Circulation That Can Warm the Polar Summer Mesopause by as Much as 5K. the Relationship Between Arctic Winter PRW Activity and Summer Mesospheric 2-DAY Wave Enhancements Has Not Been Systematically Investigated in Observations. Drawing on Work by Orsolini Et Al. (1997) Limpasuvan Et Al. (2000) and Mccormack Et Al. (2009) We Hypothesize That the Hemispheric Linkage Is Effected by Meridional Circulations That Attend Inertial Instability Outbreaks in the Equatorial Mesosphere That Seed the 2-DAY Wave in the Summer Mesosphere. the Leading Objectives of This Proposal Are to Harness Satellite Measurements to Explicitly Quantify the Effects of the 2-DAY Wave Upon PMC and the Coupling of the 2-DAY Wave to PRW Breaking and Inertial Instability. We Will 1. Compute 2-DAY Wave Forcing From Temperatures Mapped During the Aim Mission Austral Summers and Examine the Response of the Summer Mesopause to This Forcing Using a 2D Model; 2. Evaluate the Sensitivity of Ice Formation and Occurrence in a 0-D Model to 2-DAY Wave Forcing and Compare With Aim Data; 3. Analyze Concurrent Wintertime Planetary Waves and Inertial Instability in Timed and Aura Temperatures and Estimate Their Wave Forcing and 4. Use a Primitive Equation Model to Explicitly Evaluate the Response of the Summer Easterly Jet to Forcing by Planetary Waves and Inertial Instability. the Proposed Work Describes an End-to-end Study Quantifying the Contributions of Planetary Wave-driven Circulations to the Arctic-summer Mesopause Teleconnection. in Doing So We Enhance the Understanding of PMC Variability as a Global Warming Proxy. This Proposal Addresses Key Science Goal 2 Articulated in the Nasa Heliophysics Decadal Survey: ``determine the Dynamics and Coupling of Earth S Magnetosphere Ionosphere and Atmosphere and Their Response to Solar and Terrestrial Inputs.'' Our Proposed Work Is Pertinent to Science Goal AIMI-2 Meteorological Driving of the It System: How Does Lower Atmosphere Variability Affect Geospace?''