Lidar observations of long range dust transport over Mauna Loa Observatory

2017 ◽  
Author(s):  
John E. Barnes ◽  
Jalal-ud-din Butt ◽  
Nimmi C. P. Sharma
Keyword(s):  
Long Range ◽  
Dust Transport ◽  
Mauna Loa ◽  
Lidar Observations

Impacts of local versus long-range transported aerosols on PM10 concentrations in Seoul, Korea: An estimate based on 11-year PM10 and lidar observations

2021 ◽  
Vol 750 ◽  
pp. 141739
Author(s):  
Do-Hyeon Park ◽  
Sang-Woo Kim ◽  
Man-Hae Kim ◽  
Huidong Yeo ◽  
Sang Seo Park ◽  
...  
Keyword(s):  
Long Range ◽  
Lidar Observations

scholarly journals Cloud macro-physical properties in Saharan dust laden and dust free North Atlantic trade wind regimes: A lidar study

2019 ◽  
Author(s):  
Manuel Gutleben ◽  
Silke Groß ◽  
Martin Wirth
Keyword(s):  
Physical Properties ◽  
Long Range ◽  
Climate Models ◽  
Airborne Lidar ◽  
Saharan Dust ◽  
Radiation Budget ◽  
Trade Wind ◽  
Height Distribution ◽  
Dust Transport ◽  
Shallow Marine

Abstract. Saharan dust is known to have an important impact on the atmospheric radiation budget, both directly and indirectly by changing cloud properties. However, up to now it is still an open question if elevated and long-range transported Saharan dust layers have an effect on subjacent marine trade wind cloud occurrence. Shallow trade wind clouds have a significant impact on the Earth's radiation budget and still introduce large uncertainties in climate sensitivity estimates, because of their poor representation in climate models. The Next-generation Aircraft Remote-Sensing for Validation studies (NARVAL) aimed at providing a better understanding of shallow marine trade wind clouds and their interplay with long-range transported elevated Saharan dust layers. Two airborne campaigns were conducted – the first one in December 2013 and the second one in August 2016; the latter one during the peak season of transatlantic Saharan dust transport. Airborne lidar measurements in the vicinity of Barbados performed during the second field campaign are used to investigate possible differences between shallow marine cloud macro-physical properties in dust-free regions and regions comprising elevated Saharan dust layers. The cloud top height distribution derived in dust-laden regions differs from the one derived in dust-free regions and indicates that clouds are shallower and convective development is suppressed. Furthermore, regions comprising elevated Saharan dust layers show a larger fraction of small clouds and larger cloud free regions, compared to dust-free regions. The cloud fraction in dusty regions is only 14 % compared to a fraction of 31 % in dust-free regions. Moreover, a decreasing trend of cloud fractions and cloud top heights with increasing dust layer vertical extent as well as aerosol optical depth is found.

scholarly journals EARLINET observations of the 14–22-May long-range dust transport event during SAMUM 2006: validation of results from dust transport modelling

Tellus B ◽  
2009 ◽  
Vol 61 (1) ◽  
pp. 325-339 ◽  
Author(s):  
D. MüLLER ◽  
B. Heinold ◽  
M. Tesche ◽  
I. Tegen ◽  
D. Althausen ◽  
...  
Keyword(s):  
Long Range ◽  
Transport Modelling ◽  
Dust Transport ◽  
Validation Of Results

Aerosol optical properties at Mauna Loa Observatory: Long-range transport from Kuwait?

1992 ◽  
Vol 19 (6) ◽  
pp. 581-584 ◽  
Author(s):  
B. A. Bodhaine ◽  
J. M. Harris ◽  
J. A. Ogren ◽  
D. J. Hofmann
Keyword(s):  
Optical Properties ◽  
Long Range ◽  
Long Range Transport ◽  
Aerosol Optical Properties ◽  
Mauna Loa ◽  
Range Transport

Impact of long-range desert dust transport on hydrometeor formation over coastal East Asia

2016 ◽  
Vol 34 (1) ◽  
pp. 101-115 ◽  
Author(s):  
Zhenxi Zhang ◽  
Wen Zhou ◽  
Mark Wenig ◽  
Liangui Yang
Keyword(s):  
East Asia ◽  
Long Range ◽  
Dust Transport ◽  
Desert Dust

scholarly journals Impact of Long-Range Dust Transport on Northern California in Spring 2002

2005 ◽  
Author(s):  
P Cameron-Smith ◽  
D Bergmann ◽  
C Chuang ◽  
G Bench ◽  
S Cliff ◽  
...  
Keyword(s):  
Long Range ◽  
Northern California ◽  
Dust Transport

scholarly journals Statistical analysis of the mesospheric inversion layers over two symmetrical tropical sites: Réunion (20.8° S, 55.5° E) and Mauna Loa (19.5° N, 155.6° W)

2017 ◽  
Vol 35 (6) ◽  
pp. 1177-1194 ◽  
Author(s):  
Nelson Bègue ◽  
Nkanyiso Mbatha ◽  
Hassan Bencherif ◽  
René Tato Loua ◽  
Venkataraman Sivakumar ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Mean Amplitude ◽  
Temperature Inversion ◽  
Tropical Region ◽  
Height Range ◽  
Tropical Regions ◽  
Mauna Loa ◽  
Annual Component ◽  
Rayleigh Lidar ◽  
Lidar Observations

Abstract. In this investigation a statistical analysis of the characteristics of mesospheric inversion layers (MILs) over tropical regions is presented. This study involves the analysis of 16 years of lidar observations recorded at Réunion (20.8° S, 55.5° E) and 21 years of lidar observations recorded at Mauna Loa (19.5° N, 155.6° W) together with SABER observations at these two locations. MILs appear in 10 and 9.3 % of the observed temperature profiles recorded by Rayleigh lidar at Réunion and Mauna Loa, respectively. The parameters defining MILs show a semi-annual cycle over the two selected sites with maxima occurring near the equinoxes and minima occurring during the solstices. Over both sites, the maximum mean amplitude is observed in April and October, and this corresponds to a value greater than 35 K. According to lidar observations, the maximum and minimum mean of the base height ranged from 79 to 80.5 km and from 76 to 77.5 km, respectively. The MILs at Réunion appear on average ∼ 1 km thinner and ∼ 1 km lower, with an amplitude of ∼ 2 K higher than Mauna Loa. Generally, the statistical results for these two tropical locations as presented in this investigation are in fairly good agreement with previous studies. When compared to lidar measurements, on average SABER observations show MILs with greater amplitude, thickness and base altitudes of 4 K, 0.75 and 1.1 km, respectively. Taking into account the temperature error by SABER in the mesosphere, it can therefore be concluded that the measurements obtained from lidar and SABER observations are in significant agreement. The frequency spectrum analysis based on the lidar profiles and the 60-day averaged profile from SABER confirms the presence of the semi-annual oscillation where the magnitude maximum is found to coincide with the height range of the temperature inversion zone. This connection between increases in the semi-annual component close to the inversion zone is in agreement with most previously reported studies over tropics based on satellite observations. Results presented in this study confirm through the use of the ground-based Rayleigh lidar at Réunion and Mauna Loa that the semi-annual oscillation contributes to the formation of MILs over the tropical region.

Variations in atmospheric methane at Mauna Loa Observatory related to long-range transport

1992 ◽  
Vol 97 (D5) ◽  
pp. 6003 ◽  
Author(s):  
Joyce M. Harris ◽  
Pieter P. Tans ◽  
Edward J. Dlugokencky ◽  
Kenneth A. Masarie ◽  
Patricia M. Lang ◽  
...  
Keyword(s):  
Long Range ◽  
Long Range Transport ◽  
Atmospheric Methane ◽  
Mauna Loa ◽  
Range Transport
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