Climate Application: Aerosol Direct Radiative Forcing. Alex Kuwano SIOG 135/236 Spring 2018

Transcription

1 Climate Applicatin: Aersl Direct Radiative Frcing Alex Kuwan SIOG 135/236 Spring 2018

2 Backgrund Infrmatin SW shrtwave LW - lngwave Figure 2. Figure 1.

3 Backgrund Infrmatin AOD Aersl ptical depth τ = z kabs ρ a dz ADRE Aersl direct radiative effect ADRE = F aer,up F aer,dwn F 0,up F 0,dwn F aer,up = Upward Flux with aersls F aer,dwn = Dwnward Flux with aersls F 0,up = Upward Flux withut aersls F 0,dwn = Dwnward Flux withut aersls FE Aersl frcing efficiency FE = d ADRE dτ

4 Backgrund Infrmatin Aersls increase scattering f SW radiatin Aersls can decrease utging LW radiatin Figure 3. Figure 4.

5 Applicatin Papers Sundström, et al. Eastern China (20-40 N, E) between March and Octber 2009 ADRE = F 0,TOA F aer,toa TOA tp f the atmsphere Nrmalizatin f F aer,toa due t effects f slar zenith angle, water vapr, surface albed, and Sun-Earth distance

6 Applicatin Papers Sundström, et al. Cluds and the Earth s Radiant Energy System (CERES) n Terra Latitude, lngitude, F aer,toa, 550 nm AOD, and precipitable water Aersl Rbtic Netwrk (AERONET) Single scattering albed (SSA) MODerate Imaging Spectrradimeter (MODIS) Land Cver Type Climate Mdeling Grid prduct (MCD12C1) Identify in-land water bdies Prvide SW bradband black-sky albed input fr UVSPEC radiative transfer mdel UVSPEC Determine ADRE diurnal variatin and mdel F 0,TOA fr later cmparisn

7 Applicatin Papers Sundström, et al. Figure 5. Left withut nrmalizing Right after nrmalizing (Sundström, et al., 2015)

8 Applicatin Papers Sundström, et al. Figure 12. Tp rw instantaneus median ADRE Middle rw 24hr averaged median ADRE Bttm rw median AOD (Sundström, et al., 2015)

9 Applicatin Papers Peris-Ferrús, et al. Western Mediterranean during a dust strm n June 23, 2008 Heating rate prfile, Aersl Heating Rate (AHR), and surface and TOA ADRE ADRE = F aer z F 0 (z) T z t = g c p F net z p AHR = T z t AER T z t 0

10 Applicatin Papers Peris-Ferrús, et al. MODIS n Aqua Retrievals f AOD and Angström expnent Clud-Aersl Lidar with Orthgnal Plarizatin (CALIOP) n CALIPSO Retrievals f aersl extinctin prfile AERONET Aersl size distributin, SSA, and asymmetry parameter MODerate spectral reslutin atmspheric TRANsmissin (MODTRAN) radiative transfer mdel Inputs: aersl extinctin prfile, asymmetry parameter, and AOD

11 Applicatin Papers Peris-Ferrús, et al. Table 3. Instantaneus surface and TOA ADRE and FE Gray land-sea surface pixels (Peris-Ferrús, 2017)

12 Applicatin Papers Peris-Ferrús, et al. Figure N a) extinctin prfiles b) AHR in SW c) AHR in LW (Peris-Ferrús, 2017)

13 Data Prcessing s far Slar Inslatin (W/m 2 ), TOA SW Upward Flux (W/m 2 ), and AOD Spatially averaged CERES and MODIS (filtered fr dust AOD) Sahara Desert in 2016 Excludes February 19 th 27 th

14 Data Prcessing s far Time series f Slar Inslatin, TOA SW Upward Flux, and AOD

15 Data Prcessing s far Scatter plt f AOD and TOA SW Upward Flux Linear fit between AOD and TOA SW Upward Flux FE = W/m 2 /unit f AOD F 0,TOA = 79.8 W/m 2

16 Thank yu!

17 References Natinal Aernautics and Space Administratin, Science Missin Directrate. (2010). The Earth's Radiatin Budget. Retrieved [insert date - e.g. August 10, 2016], frm NASA Science website: Hartmann, D. L. (1994) Glbal Physical Climatlgy. San Dieg, CA: Academic Press. Peris-Ferrús, C., Gómez-Am, J. L., Marcs, C., Freile-Aranda, M. D., Utrillas, M. P., & Martínez-Lzan, J. A. (2017). Heating rate prfiles and radiative frcing due t a dust strm in the Western Mediterranean using satellite bservatins. Atmspheric envirnment, 160, Sundström, A. M., Arla, A., Klmnen, P., Xue, Y., de Leeuw, G., & Kulmala, M. (2015). On the use f a satellite remte-sensing-based apprach fr determining aersl direct radiative effect ver land: a case study ver China. Atmspheric Chemistry and Physics, 15(1),