Support from NSF and Clean Air Task Force

Slides:

Advertisements

Similar presentations

Water Vapor and Lapse Rate Feedbacks Neil Gordon ESP Seminar April 14, 2006.

Advertisements

METO621 Lesson 18. Thermal Emission in the Atmosphere – Treatment of clouds Scattering by cloud particles is usually ignored in the longwave spectrum.

Low clouds in the atmosphere: Never a dull moment Stephan de Roode (GRS) stratocumulus cumulus.

Radiative Properties of Clouds SOEE3410 Ken Carslaw Lecture 3 of a series of 5 on clouds and climate Properties and distribution of clouds Cloud microphysics.

Climate Forcing and Physical Climate Responses Theory of Climate Climate Change (continued)

Radiative Properties of Clouds SOEE3410 Ken Carslaw Lecture 3 of a series of 5 on clouds and climate Properties and distribution of clouds Cloud microphysics.

Chapter 6: Global Fluxes and The Deep Circulation Heat Budget Conservation of Salt Oceanic Water Masses Oceanic Mixing Temperature - Salinity Diagrams.

DARGAN M. W. FRIERSON DEPARTMENT OF ATMOSPHERIC SCIENCES DAY 4: 04/08/2010 ATM S 111, Global Warming: Understanding the Forecast.

Can Arctic Sea Ice Summer Melt be Accelerated by Changes in Spring Cloud Properties? I. Gorodetskaya 1, B. Tremblay 1,2, B. Liepert 1, M. Cane 1 1 Lamont-Doherty.

Radiative Properties of Clouds ENVI3410 : Lecture 9 Ken Carslaw Lecture 3 of a series of 5 on clouds and climate Properties and distribution of clouds.

Radiation’s Role in Anthropogenic Climate Change AOS 340.

4. Models of the climate system. Earth’s Climate System Sun IceOceanLand Sub-surface Earth Atmosphere Climate model components.

Chapter 4 The Energy Balance of The Surface Kiehl and Trenberth (1997) 1.Why The SEB? 2.What and How? a.SEB components (Rn, SH, LE, G, B, Tskin, ε, α,

Earth-Atmosphere Energy Balance Earth's surface absorbs the 51 units of shortwave and 96 more of longwave energy units from atmospheric gases and clouds.

INCREASED ARCTIC CLOUD LONGWAVE EMISSIVITY ASSOCIATED WITH POLLUTION FROM MID-LATITUDES BY: GARRETT & ZHAO (2006) AEROSOL EFFECTS ON CLOUD EMISSIVITY AND.

The Greenhouse Effect A quick review. The Greenhouse Effect A natural process that keeps the surface of the earth at a habitable temperature. A natural.

Clouds, Aerosols and Precipitation GRP Meeting August 2011 Susan C van den Heever Department of Atmospheric Science Colorado State University Fort Collins,

Impact of Short-Lived Pollutants on Arctic Climate (SPAC) Background and Progress Since January 2007 GISS Meeting SPAC Workshop, November 5 – 7, 2007 Oslo,

Radiation in the Atmosphere (Cont.). Cloud Effects (2) Cloud effects – occur only when clouds are present. (a) Absorption of the radiant energy by the.

Air Pollution Video ssetDetail.cfm?guidAssetID=17C C480-4CD EEA4F98CB6

Radiative Properties of Eastern Pacific Stratocumulus Clouds Zack Pecenak Evan Greer Changfu Li.

Heating of the Atmosphere

Radiation Group 3: Manabe and Wetherald (1975) and Trenberth and Fasullo (2009) – What is the energy balance of the climate system? How is it altered by.

Forest Fires: Particulate Effects on Global Climatology Akua Asa-Awuku, Christos Fountoukis, & Robyn Williams.

Case Study Example 29 August 2008 From the Cloud Radar Perspective 1)Low-level mixed- phase stratocumulus (ice falling from liquid cloud layer) 2)Brief.

The Atmosphere.

Influence of Clouds on Surface Heat Fluxes in an Energy Deficient Regime Dea Doklestic G&G 570 Class Project Heat Budget Group Presentation, June 16, 2011.

Erik Crosman 1, John Horel 1, Chris Foster 1, Erik Neemann 1 1 University of Utah Department of Atmospheric Sciences Toward Improved NWP Simulations of.

Science Discipline Overview: Atmosphere (large-scale perspective)  How might large-scale atmospheric challenges add to the scientific arguments for MOSAIC?

The Atmosphere. What is the Earth’s Atmosphere?  Our atmosphere is the mixture of gases and particles that surround the Earth.  The atmosphere is held.

AEROSOL & CLIMATE ( IN THE ARCTIC) Pamela Lehr METEO 6030 Spring 2006

Matthew Shupe Ola Persson Paul Johnston Duane Hazen Clouds during ASCOS U. of Colorado and NOAA.

Boundary Layer Clouds.

Cloud-Aerosol-climate feedback

January 13,  Expected bill in late spring – 2010  Takes effect in 2012.

Arctic Sea Ice Mass Budgets We report, you decide. Marika Holland NCAR.

The Arctic boundary layer: Characteristics and properties Steven Cavallo June 1, 2006 Boundary layer meteorology.

Journal #21 What are the 2 types of barometers? What is standard atmospheric pressure? Which type of barometer is most commonly used? An instrument used.

PAPERSPECIFICS OF STUDYFINDINGS Kohler, 1936 (“The nucleus in and the growth of hygroscopic droplets”) Evaporate 2kg of hoar-frost and determined Cl content;

Temperature Inversions the cause of the smoggy brown haze.

How the Greenhouse Effect Works/Feedback factors

Climate and the Global Water Cycle Using Satellite Data

Radiation Balance.

Climate feedbacks: Water vapor, snow/ice albedo, and clouds

TOPIC 6 INSOLATION.

Condensation in the Atmosphere

Observations of the Arctic boundary layer clouds during ACSE 2014

Stratocumulus cloud thickening beneath layers of absorbing smoke aerosol – Wilcox, 2010 The semi-direct aerosol effect: Impact of absorbing aerosols.

Condensation in the Atmosphere

Influence of climate variability and

5. Temperature Structure

The Atmosphere: Part 2: Radiative equilibrium

Validation of Satellite-derived Lake Surface Temperatures

Measurements of brown carbon in and around clouds

Jeff Key*, Aaron Letterly+, Yinghui Liu+

Condensation in the Atmosphere

Annual cycle of cloud fraction and surface radiative cloud forcing in the South-East Pacific Stratocumulus region Virendra P. Ghate and Bruce A. Albrecht.

Greenhouse Gases and Climate Modeling

Microphysical-macrophysical interactions or Why microphysics matters

Global Warming Effects of increase CO2

Tore Furevik Geophysical Institute, University of Bergen

Sounding from High Spectral Resolution Infrared Observations Workshop

Arctic Clouds and Climate Change

Weather and Atmosphere

CO2 forcing induces semi-direct effects

Total surface flux (+up) from models

Human Impacts on Climate Change

Climate Change – Causes and Impacts

Betsy Berry and Jay Mace University of Utah

Climatic implications of changes in O3

Presentation transcript:

Support from NSF and Clean Air Task Force The role of radiative-dynamic feedbacks in amplifying surface warming by Arctic stratus in polluted conditions Tim Garrett University of Utah Collaborations with Chuanfeng Zhao, Melissa Maestas, Mike Zulauf, and Steve Krueger at UU Support from NSF and Clean Air Task Force

Arctic Stratus at full resolution (30 m x 300 m)

Cloud Radiative Forcing Most Polluted

F(LW) = T4 Winter – Enhanced Cloud Longwave Emissivity (+ΔT) Thin, polluted cloud. Better insulator. Heat is trapped and re-emitted. [Garrett and Zhao, Nature, 2006] Thin, clean cloud Poor insulator Heat escapes F(LW) = T4

Cloud emissivity depends foremost on cloud thickness Garrett et al. (2002) JAS

Cloud emissivity also depends on re and potentially also Arctic pollution Garrett et al. (2002) JAS

Measurements ARM remote sensing NOAA aerosol Barrow Site ERS-Gome satellite Ozone profile Temperature and water vapor profiles

Upper haze quartile Clean Polluted Lower haze quartile All Low Cloud

Liquid Cloud

LES Modeling

Polluted, 44 hrs Clean, 44 hrs Polluted, 48 hrs Clean, 48 hrs Cloud forms Polluted cloud is thicker

FLW FLW FLW

Summary Seasonal pollution is associated with changes in low-level Arctic cloud properties Smaller radii Larger LWP too! Extra higher longwave cloud emissivity When polluted and cloudy, extra warming is between 10 and 20 W/m2 more than clean and cloudy

Summary Increases in downwelling longwave fluxes occur in late winter and early spring, at the beginning of the melting ‘push’

Summary The CRF increases are larger than would be expected from effective radius decreases alone There may be interesting interactions between pollution and cloud dynamics, associated with enhanced cloud top radiative cooling Cloud cover Cloud circulations Cloud top entrainment Cloud forcing?