John Barnes NOAA/ESRL/Global Monitoring Division N. C. Sharma, - - PowerPoint PPT Presentation

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Jun 08, 2023 116 likes •269 views

Measurements of the Boundary Layer at Mauna Loa Observatory, Hawaii John Barnes NOAA/ESRL/Global Monitoring Division N. C. Sharma, Central Connecticut State University We would like to acknowledge: GMD Aerosol group GMD Global Radiation

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Measurements of the Boundary Layer at Mauna Loa Observatory, Hawaii

John Barnes NOAA/ESRL/Global Monitoring Division

N. C. Sharma,

Central Connecticut State University

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We would like to acknowledge: GMD Aerosol group GMD Global Radiation group Early and present Mauna Loa Observatory Staff Earlier work on MLO Boundary Layer: Bernard Mendonca, Characterized Upslope/Downslope with tethered balloon (J. Appl. Meteor. 1969) Steve Ryan, barrier wind effect, source altitudes of MLO air (JGR, 1997)

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Ryan, JGR, 1997 Daytime source region below MLO: 90% of time Nighttime source region below MLO: 60% of time Medonca, J. Appl. Meteor. 1969 Tethered balloon measurement of morning transition Daytime (Upslope) layer 7 X thicker than Nighttime (Downslope)

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View of MLO Looking West 7 degree slope

190 m 10 m 38 m Tower CLidar Camera

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Aerosol Measurements Over Mauna Loa Observatory

Nimmi C. P. Sharma, John E. Barnes

Poster Session

4000 5000 6000 7000 8000 9000 10000 0.0005 0.001 0.0015 0.002 0.0025 0.003 0.0035 0.004 0.0045 0.005 ALTITUDE (MASL) AEROSOL EXTINCTION (1/KM)

ALTITUDE VS. AEROSOL EXTINCTION (2007 & 2008)

Grand Average Filtered Aerosol Extinction Mean + sigma Mean - sigma

Tropospheric Aerosol Scale Height 2.5 km

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190 m 38 m Tower 10 m Aerosol Intake

Upslope/Downslope Transition Better mixing

~30% more Aerosol

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190 m 38 m Tower 10 m Aerosol Intake CLidar Camera

Altitudes of peak in downslope (nighttime) aerosols

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View of MLO Looking West 7 degree slope

190 m 38 m Tower

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View of MLO Looking West 7 degree slope

190 m 4 3 6 8 18 Daily Delta T (C )

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190 m

Daytime - Heating

6.84 kW*Hr/m2 Albedo 5% 100% 1% Air Heating 56% Ground Heating

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Possible future work: Wind profiler Better Lava temperature measurements

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John Barnes, NOAA/ESRL/Global Monitoring Division

N. C. Sharma, Central

Connecticut State University

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NASA/CALIOP Space Lidar, Aerosol Phase Functions

Vary large range (not known well) to convert single-angle scatter to total scatter. Which one is “right”?

CLidar and Satellite Lidar Ratio Ext/Back