Ground-based aerosol measurements update: AERONET, MPLNET, SMART-COMMIT Operational Status Science Results Future Plans Issues ?? Brent Holben, Judd Welton, Si-Chee Tsay

AERONET Status Provide a long term data set to: Characterize aerosol optical properties Validate Satellite & model aerosol retrievals Synergism with Satellite obs., models sfc net 321 instruments ~160-220 Operational sites Network Partners GSFC Photons (France) RIMA (Spain) CSIRO (Australia) AEROCAN (Canada) Expansion to Asia, Africa, high latitudes and over water sites

AERONET support for Field Campaigns East AIRE-east China Base Asia-Thailand Milagro-Mexico AMMA-W. Africa ABC- Pacific, Indian Oceans, East Asia ARM sites RAJO-MEGHA: Indo-Gangenic Plain (2007) JAMEX: Asian Monsoon (2008-2010) Seven Seas-S. Asia and SE Asia (2008?) International Polar Year

AERONET Inversion: Ver. 2.0 Unified Inversion products from combined Sphere/Spheroid models Dynamic surface reflectances MODIS & IGBP Ecosystem reflectance (16 day product) + generic BRDF Cox-Munk for ocean sites (hybrid for coastal sites) Snow and Ice from NISE product (daily) Forcing computations Uncertainty Assessment w/ all products Inversion Products for PP retrievals

AERONET-OC (Ocean Color) SeaPRISM (cimel) Normalized water leaving radiances (Lwn)➨ QA Ship based AOD network Class 1 & 2 waters Ocean transects Coastal Cruises

AERONET Science Aerosol Characterization Algorithm Development AOD Retrievals Validation Synergism Significant Enabling: ‘AERONET Paper’- 605 citations since 1998, 113 citations in 2006 Staff citations of 4 key AERONET papers since 2000: 765

AERONET Directions Collaboration and co-location w/ other networks and observatories Cloud Optical depth retrievals Lunar Photometer 2008-new Sun-Sky system to be phased in 2008-CO2 network (±3ppm accuracy anticipated), collaboration w/Heaps and Georgieva BAMGOMAS➔Synergy Tool REASoN➔Measure for MEaSUREs Linking site data sets ➔ESDRs

Overview & Status http://mplnet.gsfc.nasa.gov Objective: Long-term, local - regional - worldwide aerosol and cloud profile observations using common instrument & data processing in a federated network Status: 11 active sites 7 planned sites (in preparation) 6 proposed sites (funding dependent) 12 short-term field campaigns 1 Ocean cruise (two cruises pre-dating MPLNET are available) * Most sites are co-located with AERONET * Campaigns utilize SMART-COMMIT and/or MAARCO platforms Goddard team + 11 Partners compose MPLNET: NASA LaRC NOAA ESRL Naval Research Lab - Monterey Japan’s National Institute of Polar Research Spain’s Instituto Nacional de Técnica Aeroespacial - INTA 4 US Universities 2 Korean Universities 1 Taiwan University other partners pending active sites field campaigns planned sites proposed sites former campaign, permanent site planned former campaign, permanent site proposed * line denotes research cruise http://mplnet.gsfc.nasa.gov

New MPLNET Products Coming Soon: GSFC: 10/29/2005 Chiu et al., Cloud optical depth retrievals from solar background “signal” of micropulse lidars, Geosci. Rem. Sens. Lett., accepted, 2007. Thick Cloud Optical Depth Product Stratus -- MPL blocked Cloud Optical Depth New MPLNET Products Coming Soon: Aerosol Level 2 (quality assured) extinction and Level 3 continuous extinction online currently available offline only on request level 2 products recently validated, error <20% (Schmid et al. 2006) AERONET derived lidar ratio will be included in 1.5 & 2 products Cirrus flag for AERONET AOD obs will be generated Clouds Multiple cloud height product under development joint with Haeffelin et al. at LMD (STRAT algorithm) includes thin cloud (cirrus) optical depth & PBL height Thick cloud optical depth product will come on-line Chiu & Marshak collaboration see example in right panel Polar Stratospheric Cloud Products Campbell development during PhD see example below CALIPSO Validation: we will provide orbit subsets over each site to all partners Campbell, J. R., Autonomous full-time lidar measurements of polar stratospheric clouds at the South Pole, Ph. D. dissertation, Atmospheric Sciences Program, University of Alaska, Fairbanks, 189 pp, 2006. Polar Stratospheric Cloud Product

http://mplnet.gsfc.nasa.gov Other News Since the 2006 Aerosol Update: Publications: Chiu et al., Cloud optical depth retrievals from solar background “signal” of micropulse lidars, Geosci. Rem. Sens. Lett., accepted, 2007. Campbell, J. R., Autonomous full-time lidar measurements of polar stratospheric clouds at the South Pole, Ph. D. dissertation, Atmospheric Sciences Program, University of Alaska, Fairbanks, 189 pp, 2006. Kuzmanoski, M., et al., Aerosol properties computed from aircraft-based observations during the ACE-Asia campaign: 2. A case study of lidar ratio closure, Aerosol Sci. Tech., accepted, 2007. M. Shiobara, et al., Arctic experiment for the ICESat/GLAS ground validation with a Micro-Pulse Lidar at Ny-Alesund, Svalbard, Polar Meteorol. Glaciology, 20, 28-39, 2007. MPLNET will participate in the WMO sponsored Gaw Aerosol LIdar Observation Network (GALION) - an attempt at worldwide coordinated aerosol lidar measurements 1st implementation meeting is scheduled in Hamburg next month, whitepaper to be completed soon Our website is being redesigned, and the new site will be public soon. The new synergy tool will be integrated into our website for expanded data browsing, and new data product search and download tools will be provided (including multi-month downloads). MPLNET is funded by the NASA Radiation Sciences Program and the Earth Observing System. Recently renewed for operations through 2010 MPLNET People: Principal Investigator: Judd Welton, NASA GSFC Code 613.1 Data Processing & Analysis: James Campbell, University of Alaska - Fairbanks Larry Belcher, UMBC GSFC Code 613.1 Instrumentation & Network Management: Tim Berkoff, UMBC GSFC Code 613.1 Sebastian Stewart, SSAI GSFC Code 613.1 Sandra Valencia, recently left project for grad school GLAS Validation Activities: Jim Spinhirne, NASA GSFC Code 613.1 Judd Welton, Tim Berkoff CALIPSO Validation Activities: Judd Welton, Tim Berkoff, James Campbell, Ken Sassen AERONET & Synergy Tool Partnership: Brent Holben, NASA GSFC Code 614.4 Dave Giles, NASA GSFC Code 614.4 NASA SMART-COMMIT Field Deployments: Si-Chee Tsay, NASA GSFC 613.2 Jack Ji, NASA GSFC 613.2 Site Operations & Science Investigations …. many network partners around the world http://mplnet.gsfc.nasa.gov

SMART and COMMIT Ground-based mobile laboratories armed with sophisticated instrumentation Mission: • Earth Observing System (EOS) validation • Innovative investigations • Long-term atmospheric monitoring Field deployment: Bring 50+ more instruments to an AERONET site and turn it into a super-site Field Campaigns: SCSMEX EOPACE DESIRE PRIDE SAFARI ACE-ASIA CRYSTAL-FACE ARM AEROSOL IOP UAE2 EAST-AIRE BASE-ASIA, 2006 NAMMA, 2006 AERONET

Create dynamic Earth System Data Records over ground-based sites Measure for MEaSUREs: Create dynamic Earth System Data Records over ground-based sites Ground-based data sets Multi-Satellite Aerosol products Assimilation aerosol products MODIS surface albedos Retrieved surface albedos from joint inversion Ancillary products: Backtrajectories 0 Hr Met forecasts