Post on 04-Aug-2020
Micro-Pulse Lidar Network (MPLNET): 10 Years of Trying to Imitate AERONET
Principal Investigator:Judd Welton, NASA GSFC Code 613.1
Instrumentation & Network Management:Sebastian Stewart, SSAI GSFC Code 613.1
Tim Berkoff, UMBC GSFC Code 613.1
Data Processing & Analysis:Larry Belcher, UMBC GSFC Code 613.1James Campbell, Naval Research Lab
Administrative Support:Sonia Cyrus, SSAI GSFC Code 613.1
GLAS Validation Activities:Jim Spinhirne, formerly NASA GSFC Code 613.1
Judd Welton, Tim Berkoff
CALIPSO Validation Activities:Judd Welton, Tim Berkoff, James Campbell
AERONET & Synergy Tool Partnership:Brent Holben, NASA GSFC Code 614.4Dave Giles, NASA GSFC Code 614.4
NASA SMARTLABS Field Deployments:Si-Chee Tsay, NASA GSFC Code 613.2
Jack Ji, UMCP GSFC Code 613.2Carlo Wang, UMCP GSFC Code 613.2
Site Operations & Science Investigations…. many network partners around the world
MPLNET is funded by the NASA Radiation SciencesProgram and the Earth Observing System
MPLNET information and results shown here are theresult of efforts by all of our network partners!
Micro-Pulse Lidar Network (MPLNET)
http://mplnet.gsfc.nasa.gov
TropopauseCirrus
Transported Aerosol(Asian Dust, Pollution)
Boundary Layer(local aerosol)
Example of MPLNET Level 1 Data: Atmospheric StructureA
ltitu
de (k
m)
Time UTC
MPLNET Sites: 2000 - currentSouth Pole MPLNET Site:1999-current
MPLNET: 5.3 Trillion Laser Shots and counting …..
• A federated network of micro pulse lidar sites around the world, coordinated and lead from Goddard Space Flight Center
• Co-location with related networks, including NASA AERONET• Local, regional, and global scale contributions to atmospheric research• Satellite validation• Aerosol climate and air quality model validation• Impact of aerosol & cloud heights on direct and indirect climate effects• Support for wide variety of field campaigns
What’s New?
• Version 2 products released 2008
• Dongsha Island temporary site Spring 2010
• Hanoi, Vietnam planned site by early 2011
• Several proposed sites in SE Asia in support of 7-SEAS/SEAC4RS
• Other planned sites: Spain, Miami, NYC, N. Carolina, China
• Ongoing interactions with both Aerocom and ICAP communities (climate and operational air quality modeling)
Micro Pulse Lidar(GSFC Patent)
The Micro Pulse Lidar Network (MPLNET): Overview
18 Active Sites
Micro Pulse Lidar Systems (MPL)• GSFC Patent• First commercial, autonomous, eye-safe aerosol & cloud lidar (100s sold worldwide) • green wavelength (523, 527, or 532 nm)• low energy, fast pulse rate• small FOV, no multiple scattering Co-located sunphotometers are essential
Models 1 - 3: SESI Model 4: Sigma Space Corp
The MPL and MPLNET recently won a Technology Transfer award from the Federal Laboratory Consortium
May 2, 2001 May 3, 2001
00:00 12:00 00:00 12:00 00:00Morning AfternoonNighttime Nighttime Morning Afternoon
Time UTC
Altit
ude
(km
)
Tropospheric Aerosol from Asia
Well Mixed PBL Well Mixed PBLStratified PBL Stratified PBL
Asian aerosol entrainedwithin boundary layer
PBL Growth PBL Decay
Level 1 MPLNET Signals from NASA Goddard
Micro-Pulse Lidar Network (MPLNET)MPLNET Data Products
MPLNET Data Products:
Level 1 NRB Signals, Diagnostics(near real time, no quality screening)
Level 1.5 Level 1.5b: Aerosol, Cloud, PBL Heights and Vertical Feature MaskLevel 1.5a: Aerosol Backscatter, Extinction, Optical Depth Profiles and Lidar Ratio(near real time, no quality screening)
Level 2 Operational Products Under Development (beta data available upon request)(not real time, quality assured)
All data are publicly available in netcdf format. Errors included for all data products.
Data policy same as AERONET. We are a federated network, individual site providers deserve credit.
near real time: 1 hour or 1 day
The Micro Pulse Lidar Network (MPLNET): Products
The Micro Pulse Lidar Network (MPLNET): Products
AERONET column AOD nearly doublesMPLNET shows this is due to increase in PBL aerosol loading
GSFC MPLNET Site: 20 min ave
UMBC Mini Site: 20 min ave
Improve simple lidar (MPL): reduce calibration and operational headaches
MPLNET: Working towards supporting Leosphere’s EZ Lidar in the network
MPL (527 nm)
EZL (355 nm)
We are working to accommodate Sigma Space Corp. depolarization MPL, and Leosphere’s EZ Lidar instruments into MPLNET.
NASA benefit: more ground-based lidar sites available for mission support.
Partner benefit: MPLNET supported lidar sites are included in the AERONET Synergy Tool, providing increased visibility and co-located data products/analysis (AERONET, back-trajectories, satellite products, models)
Quality assurance of level 1 EZ lidar data to be provided by Leosphere, MPLNET cannot do this.
Primary goal: include non-MPLNET sites in the AERONET synergy tool
* Different data resolutions. MPL (1 min, 75 m), EZL (1 min, 15 m)
GAW Aerosol Lidar Observation Network (GALION)
2008 WMO Report:
ftp://ftp.wmo.int/Documents/PublicWeb/arep/gaw/gaw178-galion-27-Oct.pdf
First WMO Experts Meeting on the implementation ofthe GAW Aerosol Lidar Observation Network: GALIONHeld in March 2007, Hamburg Germany
The Global Atmosphere Watch (GAW) aerosol program (GAW, 2007) strives "to determine the spatio-temporal distribution of aerosol properties related to climate forcing and air quality up to multidecadal time scales".
GALION goal: provide the vertical component of aerosol distributions through advanced laser remote sensing in a network of ground-based stations.
Ray Hoff (UMBC) and Gelsomina Pappalardo (CNR-IMAA) are the GALION Leads
http://alg.umbc.edu/galion/
Represented Networks:Regional/Continental (Dense): EARLINET (EUROPE)
AD-NET (E ASIA)
CIS-LINET (CIS)
CLN (NE United States)
CORALNET (Canada)
ALINE (Central & South America, Caribbean)
Global (Sparse): MPLNET NDACC
* Independent Sites
Conceptually GALION fits GEOSS since it is a Network of Networks and GAW is GEOSS
Implementation: Steering Group (GAW - network heads) Technical Working Groups
Technology & Methodology QA/QC Data Dissemination & Outreach Model & Satellite Validation, Data
Assimilation Capacity Building
Development into other regions Integration with
Sunphotometer/Satellite Meas/Modeling
Initial observation schedule based on EARLINET
Minimum 1 obs at sunset on Mon, Thu
If possible, 1 obs midday on Mon
Site Setup Costs: MPLNET ~ $150k, AERONET ~$40k: ~$200k total
Mean MPLNET Funding since 2006: ~$880k/year total (less than half AERONET)
MPLNET Staff Manpower: ~4 FTE (AERONET ~10 FTE)
Thoughts on advanced operational profiling network:
Characterize instrument performance and quantify level 0 to level 1 data uncertainty
Develop robust QC procedures to provide level 2 data (retrievals), minimize model dependency
Long term instrument maintenance and QC tracking are major headache and time sinkChanges in subcomponents (laser) with time, can create QC nightmare
Testbed approach may not capture real world network issues & costsBest instruments from company, lots of attention & care providedReal network: wide variety of instrument performance
MPLNET + AERONET has demonstrated long term operational capability to provide continuous aerosol & cloud, satellite cal/val, Air Quality, and PBL height data for a per site cost of ~$200k
Final Thoughts: Costs and MPLNET lessons learned
Backup Slides
Peer Review Publications since 2000:
12 Lead Author Publications (MPLNET staff lead author)
34 Co-Author Publications
7 Other publications (using MPLNET data)
2 Dissertations
In review, preparation:
4 Papers in review
4 Papers in preparation
1 Dissertation starting
MPLNET Status: Publications and Applications
Publication Subject Areas:
31 aerosols15 clouds7 cal/val5 network & data processing3 modeling1 snow
Applications:
• NRT PBL Heights supplied to NCEP
• Aerosol Model Evaluation• GEOS-5 and NRL/NAAPS
would like to start effort
Aerosol Properties:
1st Step: Retrievals at coincident AERONET AOD observations (daytime only)Using constrained Fernald solution(Welton et al. 2000)
The Micro Pulse Lidar Network (MPLNET): Products
The Micro Pulse Lidar Network (MPLNET): Products
MPLNET Level 2 Flow Chart
TelescopeTemperature
Cloud Free Lidar RatioUncertainty
Calibration ZoneSignal Uncertainty
Daily Calibration Variation
Standard QA Scheme ± 2° C > 80 % < 30 % < 20 % none
QA-C Scheme ± 2° C > 80 % < 30 % < 20 % < 5 %
QA-T Scheme ± 1° C > 80 % < 30 % < 20 % none
MPLNET Level 2 Results: GSFC 2009