Compositional and Air-mass Trajectory Analysis of a Heavy Dust Episode (HDE) Aerosols in Ile-Ife, Nigeria

2016 ◽  
Vol 13 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Olusegun Fawole ◽  
Bolutife Olofinjana ◽  
Oyediran Owoade
Keyword(s):  
Trajectory Analysis ◽  
Air Mass ◽  
Air Mass Trajectory

scholarly journals APPLICATION OF BACKWARD AIR MASS TRAJECTORY ANALYSIS IN EVALUATING AIRBORNE POLLEN DISPERSION

2006 ◽  
Vol 14 (3) ◽  
pp. 113-120 ◽  
Author(s):  
Ingrida Šaulienė ◽  
Laura Veriankaitė
Keyword(s):  
Long Range ◽  
Trajectory Analysis ◽  
Airborne Pollen ◽  
Birch Pollen ◽  
Spore Trap ◽  
Pollen Dispersion ◽  
Air Mass ◽  
Air Mass Trajectories ◽  
Pollen Transport ◽  
Air Mass Trajectory

To investigate airborne pollen movement aerobiologists use backward air mass trajectories. In the present paper the peculiarities of airborne birch pollen dispersion are analysed. In 2005 at Šiauliai Aerobiology Station pollen was recorded using Hirst‐type spore trap. The situation of birch bloom in neighbouring European countries was evaluated according to the European Aeroallergen Network database. It was generalized and used to prove long‐range pollen transport. Air mass trajectories were calculated according to the HYSPLIT 4 model the trajectory drawing principle of which is based on the integration of the position of air mass with regard to time. The present study has shown that backward air mass trajectory analysis may be applied in investigating relationship among pollen dispersion, meteorological conditions and air mass transport. It is estimated that at Šiauliai Aerobiology Station the dynamics of pollen concentration is determinated by local flora and airborne pollen long‐range transport. The evaluation of pollen dispersion by the backward air mass trajectory method presented in the paper established precondition to look for possibilities of application of the HYSPLIT 4 model to prepare the forecasts of pollen dispersion.

An air-mass trajectory study of the transport of radioactivity from Fukushima to Thessaloniki, Greece and Milan, Italy

2013 ◽  
Vol 75 ◽  
pp. 163-170 ◽  
Author(s):  
A. Ioannidou ◽  
E. Giannakaki ◽  
M. Manolopoulou ◽  
S. Stoulos ◽  
E. Vagena ◽  
...  
Keyword(s):  
Air Mass ◽  
Air Mass Trajectory

Air mass origins by back trajectory analysis for evaluating atmospheric 210Pb concentrations at Rokkasho, Aomori, Japan

2009 ◽  
Vol 279 (2) ◽  
pp. 493-498 ◽  
Author(s):  
N. Akata ◽  
H. Kawabata ◽  
H. Hasegawa ◽  
K. Kondo ◽  
T. Sato ◽  
...  
Keyword(s):  
Trajectory Analysis ◽  
Back Trajectory ◽  
Air Mass ◽  
Back Trajectory Analysis

Advective Transport Modeling for Spatial Analysis of Atmospheric Aerosols over Lagos Area of South Western Nigeria

2019 ◽  
Vol 44 ◽  
pp. 91-98
Author(s):  
Mayowa Adeoye Lala ◽  
Olusola Adedayo Adesina ◽  
Anselm Igbafe
Keyword(s):  
Atlantic Ocean ◽  
Atmospheric Aerosols ◽  
Ground Level ◽  
Advective Transport ◽  
Average Wind Speed ◽  
Study Region ◽  
Air Mass ◽  
Westerly Direction ◽  
Resource Laboratory ◽  
Air Mass Trajectory

In this study atmospheric aerosols distribution over Lagos area of southwestern part of Nigeria was analyzed using backward air mass trajectory model. GPS information of the study region was used to simulate meteorological variables and aerosol data that have been stored by satellite imagery from the National Oceanography and Atmospheric Administration (NOAA) and Air Resource Laboratory (ARL). Hybrid Single-Particle Lagrangian Integrated Trajectories HYSPLIT was used to determine the wind-field information and also to obtain the backward air mass trajectory for atmospheric aerosols transport pattern at heights 0, 1000m and 2000m above ground level. The result showed that aerosols of sea-salt origin evolved from Atlantic ocean and spread over Lagos during the period under consideration. The average wind speed observed within the period ranged between 4 and 7m/s in south westerly direction which is attributed to the influence Atlantic Ocean. The results also showed that aerosol traversing Lagos area are mainly sea salts

scholarly journals The Relationship between Air-Mass Trajectories and the Abundance of Dust-Borne Prokaryotes at the SE Mediterranean Sea

Atmosphere ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 280 ◽  
Author(s):  
Eyal Rahav ◽  
Natalia Belkin ◽  
Adina Paytan ◽  
Barak Herut
Keyword(s):  
Mediterranean Sea ◽  
Temporal Variability ◽  
Airborne Microorganisms ◽  
Coastal Site ◽  
Air Mass ◽  
Dust Aerosols ◽  
Air Mass Trajectories ◽  
Airborne Microbes ◽  
The Relationship ◽  
Air Mass Trajectory

Airborne prokaryotes are transported along with dust/aerosols, yet very little attention is given to their temporal variability above the oceans and the factors that govern their abundance. We analyzed the abundance of autotrophic (cyanobacteria) and heterotopic airborne microbes in 34 sampling events between 2015–2018 at a coastal site in the SE Mediterranean Sea. We show that airborne autotrophic (0.2–7.6 cells × 103 m−3) and heterotrophic (0.2–30.6 cells × 103 m−3) abundances were affected by the origin and air mass trajectory, and the concentration of dust/aerosols in the air, while seasonality was not coherent. The averaged ratio between heterotrophic and autotrophic prokaryotes in marine-dominated trajectories was ~1.7 ± 0.6, significantly lower than for terrestrial routes (6.8 ± 6.1). Airborne prokaryotic abundances were linearly and positively correlated to the concentrations of total aerosol, while negatively correlated with the aerosol’s anthropogenic fraction (using Pb/Al or Cu/Al ratios as proxies). While aerosols may play a major role in dispersing terrestrial and marine airborne microbes in the SE Mediterranean Sea, the mechanisms involved in the dispersal and diversity of airborne microorganisms remain to be studied and should include standardization in collection and analysis protocols.

PM2.5 chemical composition at a rural background site in Central Europe, including correlation and air mass back trajectory analysis

2016 ◽  
Vol 176-177 ◽  
pp. 108-120 ◽  
Author(s):  
Jaroslav Schwarz ◽  
Michael Cusack ◽  
Jindřich Karban ◽  
Eva Chalupníčková ◽  
Vladimír Havránek ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Central Europe ◽  
Trajectory Analysis ◽  
Back Trajectory ◽  
Air Mass ◽  
Rural Background ◽  
Background Site ◽  
Back Trajectory Analysis
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