Kostas Tsigaridis.

Μέγεθος: px

Εμφάνιση ξεκινά από τη σελίδα:

Download "Kostas Tsigaridis."

Δωρίς Ζυγομαλάς
5 χρόνια πριν
Προβολές:

1 Kostas Tsigaridis

2 Sea spray 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 2

3 Sea spray Solubility (hygroscopicity) Aerosol composition cloud formation Clouds aerosol formation Clouds aerosol removal Dissolved aerosols into clouds cloud properties & lifetime 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 3

Sea spray source Tsigaridis et al., JGR, 2013 Fine mode Coarse mode SS1 0.1-1μm 1-4μm SS2 0.

4 Sea spray source Tsigaridis et al., JGR, 2013 Fine mode Coarse mode SS μm 1-4μm SS μm 1-10μm SS μm 0.5-4μm 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 4

5 Prospero and Savoie dataset, University of Miami Sea salt comparison with measurements 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 5

6 Tsigaridis et al., JGR, 2013 Sea salt comparison with measurements 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 6

7 Sea salt vs. wind speed Tsigaridis et al., JGR, /22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 7

8 Sea-spray organic enrichment SeaWiFS, 2000 O Dowd et al., 2008 Vignati et al., /22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 8

9 Organic enrichment vs. size Gantt et al., 2011 Models sea salt (sea spray) fine/coarse threshold 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 9

10 Gantt and Meskhidze, 2011 Organic enrichment vs. wind speed 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 10

11 Tsigaridis et al., JGR, 2013 Organics comparison with measurements Without oceanic organics 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 11

12 Tsigaridis et al., JGR, 2013 Organics comparison with measurements With oceanic organics 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 12

13 Oceanic aerosol budget Tracer Source (Tg a -1 ) Lifetime (days) Reference Sea salt Vignati et al., 2010 Sea salt Myriokefalitakis et al., 2010 Sea salt , 0.5 Jaeglé et al., 2010 Sea salt 1500 Long et al., 2011 Oceanic OA Duce et al., 1983 Oceanic OA (TgC a -1 ) Spracklen et al., 2008 Oceanic OA 75 (TgC a -1 ) Roelofs, 2008 Oceanic OA (TgC a -1 ) Gantt et al., 2009 Oceanic OA Vignati et al., 2010 Oceanic OA Myriokefalitakis et al., 2010 Oceanic OA 29 (TgC a -1 ) Long et al., 2011 Oceanic OA 17.7 (TgC a -1 ) Westervelt et al., /22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 13

14 Oceanic aerosol budget Tsigaridis et al., JGR, 2013 Sea salt Organics Source (Tg a -1 ) Lifetime (days) Fine Coarse Fine Coarse SS1 Gong 360 (280) (1.5) 1.1 SS2 Gong 360 (280) (1.5) 0.4 SS3 Gong 36 (28) (1.5) 1.1 SS1 Jaegle 310 (250) (1.4) 1.1 SS1 Gong SS2 Gong SS3 Gong SS1 Jaegle Fine mode Coarse mode SS μm 1-4μm SS μm 1-10μm SS μm 0.5-4μm 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 14

15 CDNC changes Tsigaridis et al., JGR, /22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 15

16 AeroCom models 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 16

17 Concluding remarks Sea salt sources differ by an order of magnitude in different global models Sea spray sources, size distribution and mixing state are critically important on oceanic OA fluxes Oceanic OA sources are very uncertain and differ by an order of magnitude between models; sea spray sources are among the ones to blame Sea salt number and size distribution? Removal? How far can we go with chlorophyll a? 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 17

18 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 18

19 Sea spray source Gong (2003) 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 19

20 Sea salt size distribution (dry radius) Fine (μg) Source (Tg a -1 ) Coarse (μg) Reference Koch et al., >0.5 Vignati et al., >0.5 Myriokefalitakis et al., Jaeglé et al., * * Long et al., Meskhidze et al., 2011 * Approximate values based on wet size at 80%RH: and They are the composite of 8 bins. 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 20

21 Tsigaridis et al., JGR, 2013 Organics comparison with measurements 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 21

22 Tsigaridis et al., JGR, 2013 Southern Ocean aerosol optical depth SS1 SS2 SS3 SS1 SS1 SS2 SS3 SS1 SS1 SS2 SS3 SS1 Fine mode Coarse mode SS μm 1-4μm SS μm 1-10μm SS μm 0.5-4μm 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 22

23 Aerosol concentration changes Sea salt Organic aerosol Tsigaridis et al., JGR, 2013 Wind speed 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 23

24 Sea-salt vs. wind speed 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS Tsigaridis et al., JGR,

25 AeroCom models sea salt source 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 25

26 AeroCom models sea salt load 2/22/2013 Kostas Tsigaridis, Columbia University/NASA GISS 26

Σχετικά έγγραφα

ΠΑΝΔΠΗΣΖΜΗΟ ΠΑΣΡΩΝ ΓΗΑΣΜΖΜΑΣΗΚΟ ΠΡΟΓΡΑΜΜΑ ΜΔΣΑΠΣΤΥΗΑΚΩΝ ΠΟΤΓΩΝ «ΤΣΖΜΑΣΑ ΔΠΔΞΔΡΓΑΗΑ ΖΜΑΣΩΝ ΚΑΗ ΔΠΗΚΟΗΝΩΝΗΩΝ» ΣΜΖΜΑ ΜΖΥΑΝΗΚΩΝ Ζ/Τ ΚΑΗ ΠΛΖΡΟΦΟΡΗΚΖ

ΠΑΝΔΠΗΣΖΜΗΟ ΠΑΣΡΩΝ ΓΗΑΣΜΖΜΑΣΗΚΟ ΠΡΟΓΡΑΜΜΑ ΜΔΣΑΠΣΤΥΗΑΚΩΝ ΠΟΤΓΩΝ «ΤΣΖΜΑΣΑ ΔΠΔΞΔΡΓΑΗΑ ΖΜΑΣΩΝ ΚΑΗ ΔΠΗΚΟΗΝΩΝΗΩΝ» ΣΜΖΜΑ ΜΖΥΑΝΗΚΩΝ Ζ/Τ ΚΑΗ ΠΛΖΡΟΦΟΡΗΚΖ ΣΜΖΜΑ ΖΛΔΚΣΡΟΛΟΓΩΝ ΜΖΥΑΝΗΚΩΝ ΚΑΗ ΣΔΥΝΟΛΟΓΗΑ ΤΠΟΛΟΓΗΣΩΝ ΣΜΖΜΑ