![Page 1: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/1.jpg)
Max Planck InstituteHamburg, Germany
S. Kinne
AEROSOLmodel vs data
ECWMF vs AERONET
mid-visible optical depth ofaerosol > 1m diameter
Max Planck InstituteHamburg, Germany
![Page 2: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/2.jpg)
2
Overview
data-setsECMWF simulationsaerosol ‘quality’ data reference
questions comparisons
magnitude –matched ? temporal phase matched ? forcing efficiencies
first impressions outlook
![Page 3: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/3.jpg)
3
simulations ... and reference
ECMWF (2 averages each day 0-12, 12-24 UTC Jan-Jun 2003)
• seasalt and dust aerosol optical depth
aot (coarse size mode)
AERONET (robotic sun/sky-photometer ground network)
• aot,s – sun mode (based on direct attenuation)• ff,s - fraction of aot by particles < 1mm diameter
– estimate based on Angstrom spectral change
aot (coarse mode) = aot,s * (1 -ff,s)
• aot,i – sky mode (based on a all-data inversion)• ff,i - fraction of aot by particles < 1mm diameter
– estimate based on retrieved size distribution aot (coarse mode) = aot,i * (1 -ff,i)
![Page 4: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/4.jpg)
4
Questions
How good are the AERONET datareference? Is there consistency?
assuming AERONET data are reliable and lookingat time-series of temporal matches …
How good are initial ECMWF simulationsfor sea-salt and dust (>1um in size) aerosol ?
phase?absolute magnitude?
Can we identify events of high aerosolloads of coarse-mode for case studies?
![Page 5: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/5.jpg)
5
locations investigated
DUSTwestern AfricaMediterranean (2) far Eastcentral Asia
SEA-SALTPacific (2)
![Page 6: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/6.jpg)
6
DUST – western Africa
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 7: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/7.jpg)
7
DUST – south Turkey
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 8: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/8.jpg)
8
DUST – central Italy
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 9: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/9.jpg)
9
Dust – far East
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 10: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/10.jpg)
10
DUST – central Asia
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 11: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/11.jpg)
11
Sea Salt, DUST - Pacific
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 12: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/12.jpg)
12
Sea-salt – south Pacific
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 13: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/13.jpg)
13
first impressions
dustmajor events simulated (“in phase”)peak values: too largebackground / off-source regions: too low
seasalt too low (…as in many other models)
interesting dust events: julian days 120-140 over Mediterranean
• seen at Italy, Turkey and Israel julian days 150-170 over the western Africa julian days 100-120 over Hawaii
![Page 14: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/14.jpg)
14
next
implement aerosol data into AeroComnetcdf (or ascii, if small), what tem. resolution ?
ground data (quality)AERONET (all data, daily, monthly) …next month
• data at anon. ftp: ftp.zmaw.de/aerocom/grd_aeronet601
your data ? (contact me for coordination: [email protected])
satellite data (pattern)satellite composite (monthly averages)best regional satellite product on a daily basis
other data in-situ, lidar….
![Page 15: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/15.jpg)
15
next
SCORINGadd and implement scoring scenes (new ideas?)
establish local, seasonal scores• average normalized deviation, (rank-) correlation
combine score regionally, globally, annually• weighting (site quality, orography, sparseness)
EMISSIONSupdate AEROCOM with GFED-2, daily cycle?data for 2003 (dust and sea-salt (LSCE?))growth factors / year? for other species ? include future scenarios in emission
![Page 16: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/16.jpg)
16
example … on ‘scoring’
sample model-data to match local measurements determine each site’s normalized average deviation
DEV = sum (|MODEL-DATA|) / sum (DATA)– (.10 to .60 for first coarse-mode simulations)
assign site specific weights (and combine) regional coverage (e.g. only site in a region) site quality (e.g. instrument issues…) site region representation (e.g. orography, pollution)
one score ! (repeat with diff. temp resolution or time-offsets)
SCORES are needed to quantify theoverall model performance with 1 value
![Page 17: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/17.jpg)
17
extra slides
![Page 18: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/18.jpg)
18
DUST – south Turkey
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 19: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/19.jpg)
19
DUST – south Italy
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 20: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/20.jpg)
20
DUST – mid East
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 21: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/21.jpg)
21
DUST – mid East
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF
![Page 22: ECWMF vs AERONET mid-visible optical depth of aerosol > 1](https://reader030.vdocument.in/reader030/viewer/2022020700/61f44572844f897bd85e645c/html5/thumbnails/22.jpg)
22
high altitude - Pacific
AERONET sun-mode… matching ECMWFAERONET sky-mode… matching ECMWF