세미나 연사 
Prof. Michael L. Kaplan(Desert Research Institute)
 세미나 장소 
과학관 553
 연도 
2018
 월 / 일 
3/21
 시간 
11:00

Title : The Unbalanced Dynamics of Deep Jet Streaks Above Developing Surface Inverted Troughs


Abstract:

We will employ high resolution observations and numerical simulations to show how the coupling between low-level and mid-tropospheric largely diabatically-forced frontogenesis results in complex upper-tropospheric jet adjustments in two seemingly radically different phenomena, i.e., 1) a major coastal cyclone and 2) downslope Diablo wind event along the East Coast of North America and West Coast of North America, respectively. As a surface inverted trough develops due to both adiabatic and diabatic forcing in both case studies, the exit regions of the upper-tropospheric jets that are initially not highly accelerative become extremely unbalanced as Lagrangian Rossby numbers >> .5 develop. This occurs in a region that should be decelerating for near thermal wind balance in either straight or curved flows, respectively. As the jet exit regions, one with weak and another with substantial curvature, accelerate, surface mesoscale inverted troughing amplifies in what appears to be a nonlinear feedback cycle in which accelerations aloft produce mass adjustments that strengthen the surface systems which in turn enhance the upper-level exit region accelerations. Extraordinary mesoscale vortices and precipitation swaths develop in the coastal storm case study only observable with GOES-16, visible, and ASCAT scatterometer satellite data, surface observations, and also in numerical simulations. Anticyclonic shear vortices develop in the Diablo wind case study where mesonet surface and wind profilers are compared to simulations. A theory will be presented for how such a breakdown in quasi-geostrophic and quasi-gradient wind balance occurs.

목록

Page 1 / 10
제목  세미나 연사   세미나 장소   연도   월 / 일   시간 

The Dark Energy Survey (DES)

| 천문우주학
Dr. Douglas Tucker (Fermi lab) 과학관 638 2018 8/20 16:00

YSOs and Protoplanetary Disks in Diverse Environments in the Orion A Region

| 천문우주학
Dr. J. Serena Kim (Steward Observatory, University of Arizona) 과학관B101 2018 6/29 11:00

Magnetic Fields in Star Formation

| 천문우주학
Dr. Woojin Kwon (KASI) 과학관B102 2018 6/8 11:00

Studying galaxies in three dimensions

| 천문우주학
Prof. Michele Cappellari ( University of Oxford ) 과학관B102 2018 6/1 11:00

실시간 Processor-in-the-Loop (PIL) 시뮬레이션을 통한 큐브위성 자세결정 알고리즘 검증

| 천문우주학
정동원 교수님 (한국항공대학교) 과학관B101 2018 5/25 14:30

Cassiopeia A: Supernova Remnant for a Case Study of Core-Collapse Supernova Explosion

| 천문우주학
Prof. Bon-Chul Koo (Seoul National University) 과학관B102 2018 5/18 11:00

위성 SAR 영상화 기술과 자세 스티어링(Spaceborne SAR Imaging and Attitude Steering)

| 천문우주학
유지웅 박사님 (한국과학기술원) 과학관B102 2018 5/11 11:00

지난 10년 (2008년 - 2018년) 인공강우 실험 주요결과

| 대기과학
장기호 박사님 (국립기상과학원) 과학관 553 2018 5/1 16:00

Van Gogh's Starry Night으로부터 배우는 바다에서의 난류

| 대기과학
김성용 교수님 (KAIST) 과학관 553 2018 4/17 16:00

Game Theory and Distributed Control

| 천문우주학
Prof. KwangKi Kim (Inha University) 과학관B102 2018 4/27 11:00

Network Cosmology : What I have learned from galaxy 'Facebook'

| 천문우주학
Dr. Sungryong Hong (Korea Institute for Advanced Study) 과학관B102 2018 4/20 11:00

Constraining the Lyman-alpha Equivalent Width Distribution at the end of cosmic reionization

| 천문우주학
Intae Jung (UT Austin) 과학관 638 2018 4/11 16:00

Lyman alpha emission from high-redshift galaxies and their circum-galactic medium - a joint view from MUSE and simulations.

| 천문우주학
Dr. Jeremy Blaizot(Observertoire de Lyon ) 과학관B102 2018 4/3 16:00

도시 흐름, 대류 및 분산 (Urban Flow, Convection, and Dispersion)

| 대기과학
백종진 교수님(서울대학교) 과학관 553 2018 3/27 16:00

What is Nature Astronomy and how do I get published in it?

| 천문우주학
Dr. Marios Karouzos(Nature Astronomy) 과학관B102 2018 3/23 11:00

The Unbalanced Dynamics of Deep Jet Streaks Above Developing Surface Inverted Troughs

| 대기과학
Prof. Michael L. Kaplan(Desert Research Institute) 과학관 553 2018 3/21 11:00

Korean Heatwaves and Their Association with Large-scale Atmospheric Circulation Patterns

| 대기과학
이명인 교수님(울산과학기술원) 과학관 553 2018 3/20 16:00

The MESSIER surveyor: lifting the veil on the ultra-low surface brightness universe

| 천문우주학
David Valls-Gabaud(CNRS, Observertoire de Paris) 과학관B102 2018 3/16 11:00

Characteristics of Cold Surges over East Asia and Its Relation to Arctic Oscillation

| 대기과학
박태원 교수님(전남대학교 지구과학교육과) 과학관 553 2017 12/5 16:00

기후변화적응 기술로서의 수처리적용:남태평양 도서국 사례 중심으로

| 지구시스템과학
김경웅 교수님(광주과학기술원) 과학관B104 2017 11/30 16:00