Interannual variation and trends in air pollution over Europe due to climate variability during 1958–2001 simulated with a regional CTM coupled to the ERA40 reanalysis

Tellus B ◽  
2007 ◽  
Vol 59 (1) ◽  
Author(s):  
Camilla Andersson ◽  
Joakim Langner ◽  
Robert Bergström
Keyword(s):  
Air Pollution ◽  
Climate Variability ◽  
Interannual Variation ◽  
Era40 Reanalysis

scholarly journals Spring Extreme Precipitation Days in North China and Their Reliance on Atmospheric Circulation Patterns During 1979–2019

2022 ◽  
pp. 1-41
Keyword(s):  
Climate Variability ◽  
Atmospheric Circulation ◽  
Extreme Precipitation ◽  
Interannual Variation ◽  
North China ◽  
Circulation Pattern ◽  
Southerly Wind ◽  
Atmospheric Circulation Patterns ◽  
Rain Gauges ◽  
Circulation Patterns

Abstract The interannual variation of springtime extreme precipitation (SEP) days in North China (NC) and their reliance on atmospheric circulation patterns are studied by using the continuous daily record of 396 rain gauges and the fifth generation of the European Centre for Medium-Range Weather Forecasts atmospheric reanalysis during 1979–2019. The SEP days are defined as the days when at least 10% of rain gauges in NC record daily precipitation no less than 10.5 mm. Results show that the number of SEP days shows large interannual variability but no significant trend in the study period. Using the objective classification method of the obliquely rotated principal analysis in T-mode, we classify the atmospheric circulation into five different patterns based on the geopotential height at 700 hPa. Three circulation patterns all have fronts and are associated with strong southerly wind, leading to 88% of SEP days in NC. The strong southerly wind may provide moisture and dynamic forcing for the frontal precipitation. The interannual variation of SEP days is related with the number of the three above-mentioned dominant circulation patterns. Further analysis shows that the West Pacific pattern could be one of the possible climate variability modes related to SEP days. This study reveals that the daily circulation pattern may be the linkage between SEP days and climate variability modes in NC.

Regional response of dengue fever epidemics to interannual variation and related climate variability

2014 ◽  
Vol 29 (3) ◽  
pp. 947-958 ◽  
Author(s):  
Chung-Min Liao ◽  
Tang-Luen Huang ◽  
Yi-Jun Lin ◽  
Shu-Han You ◽  
Yi-Hsien Cheng ◽  
...  
Keyword(s):  
Climate Variability ◽  
Dengue Fever ◽  
Interannual Variation

scholarly journals Effects of atmospheric circulations on the interannual variation in PM<sub>2.5</sub> concentrations over the Beijing–Tianjin–Hebei region in 2013–2018

2020 ◽  
Vol 20 (13) ◽  
pp. 7667-7682 ◽  
Author(s):  
Xiaoyan Wang ◽  
Renhe Zhang
Keyword(s):  
Boundary Layer ◽  
Air Pollution ◽  
Air Pollutants ◽  
Emission Reduction ◽  
Interannual Variation ◽  
Meteorological Conditions ◽  
Air Pollutant ◽  
Chinese Government ◽  
Near Surface ◽  
Bth Region

Abstract. The Chinese government has made many efforts to mitigate fine particulate matter pollution in recent years by taking strict measures on air pollutant reduction, which has generated the nationwide improvements in air quality since 2013. However, under the stringent air pollution controls, how the wintertime PM2.5 concentration (i.e., the mass concentration of atmospheric particles with diameters less than 2.5 µm) varies and how much the meteorological conditions contribute to the interannual variations in PM2.5 concentrations are still unclear, and these very important for the local government to assess the emission reduction of the previous year and adjust mitigation strategies for the next year. The effects of atmospheric circulation on the interannual variation in wintertime PM2.5 concentrations over the Beijing–Tianjin–Hebei (BTH) region in the period of 2013–2018 are evaluated in this study. Generally, the transport of clean and dry air masses and an unstable boundary layer in combination with the effective near-surface horizontal divergence or pumping action at the top of the boundary layer benefits the horizontal or vertical diffusion of surface air pollutants. Instead, the co-occurrence of a stable boundary layer, frequent air stagnation, positive water vapor advection and deep near-surface horizontal convergence exacerbate the wintertime air pollution. Favorable circulation conditions lasting for 2–4 d are beneficial for the diffusion of air pollutants, and 3–7 d of unfavorable circulation events exacerbates the accumulation of air pollutants. The occurrence frequency of favorable circulation events is consistent with the interannual variation in seasonal mean PM2.5 concentrations. There is better diffusion ability in the winters of 2014 and 2017 than in other years. A 59.9 % observed decrease in PM2.5 concentrations in 2017 over the BTH region could be attributed to the improvement in atmospheric diffusion conditions. It is essential to exclude the contribution of meteorological conditions to the variation in interannual air pollutants when making a quantitative evaluation of emission reduction measurements.

scholarly journals Effects of atmospheric circulations on the interannual variation in PM<sub>2.5</sub> concentrations over the Beijing-Tianjin-Hebei region in 2013–2018

2020 ◽  
Author(s):  
Xiaoyan Wang ◽  
Renhe Zhang
Keyword(s):  
Boundary Layer ◽  
Air Pollution ◽  
Air Pollutants ◽  
Emission Reduction ◽  
Interannual Variation ◽  
Meteorological Conditions ◽  
Mitigation Strategies ◽  
Chinese Government ◽  
Near Surface ◽  
Bth Region

Abstract. The Chinese government has made many efforts to mitigate fine particulate matter (PM2.5) pollution in recent years by taking strict measures on air pollutants reduction, which has generated the nationwide improvements in air quality since 2013. However, under the stringent air pollution controls, how PM2.5 concentration varies and how much the meteorological conditions contribute to the interannual variations in PM2.5 concentrations are still unclear, which is very important for the local government to assess the emission reduction of previous year and adjust mitigation strategies of next year. The effects of atmospheric circulation on the interannual variation in wintertime PM2.5 concentrations over the Beijing-Tianjin-Hebei (BTH) region in the period of 2013–2018 are evaluated in this study. Generally, the transport of clean and dry air masses and unstable boundary layer working with the effective near-surface horizontal divergence or pumping action at the top of the boundary layer benefit for the horizontal or vertical diffusion of surface air pollutants. Instead, the co-occurrence of a stable boundary layer, frequent air stagnation, positive water vapor advection and deep near-surface horizontal convergence exacerbate the air pollution. Favorable circulation conditions lasting for 2~4 days are beneficial for the diffusion of air pollutants, and 3~7 days of unfavorable circulation events exacerbate the accumulation of air pollutants. The occurrence frequency of favorable circulation events is consistent with the interannual variation in seasonal mean PM2.5 concentrations. There is better diffusion ability in the winters of 2014 and 2017 than in other years. A 76.5 % of the observed decrease in PM2.5 concentrations in 2017 over the BTH region could be attributed to the improvement in atmospheric diffusion conditions. It is essential to exclude the contribution of meteorological conditions to the variation in interannual air pollutants when making a quantitative evaluation of emission reduction measurements.

Compounding Factors: Air Pollution and Climate Variability in Mexico City

2017 ◽  
pp. 361-373 ◽  
Author(s):  
María Eugenia Ibarrarán ◽  
Iván Islas ◽  
José Abraham Ortínez
Keyword(s):  
Air Pollution ◽  
Climate Variability ◽  
Mexico City

scholarly journals The potential impacts of climate variability and change on air pollution-related health effects in the United States.

2001 ◽  
Vol 109 (suppl 2) ◽  
pp. 199-209 ◽  
Author(s):  
S M Bernard ◽  
J M Samet ◽  
A Grambsch ◽  
K L Ebi ◽  
I Romieu
Keyword(s):  
United States ◽  
Air Pollution ◽  
Climate Variability ◽  
Health Effects ◽  
The United States ◽  
Climate Variability And Change

scholarly journals The Potential Impacts of Climate Variability and Change on Air Pollution-Related Health Effects in the United States

2001 ◽  
Vol 109 ◽  
pp. 199 ◽  
Author(s):  
Susan M. Bernard ◽  
Jonathan M. Samet ◽  
Anne Grambsch ◽  
Kristie L. Ebi ◽  
Isabelle Romieu
Keyword(s):  
United States ◽  
Air Pollution ◽  
Climate Variability ◽  
Health Effects ◽  
The United States ◽  
Climate Variability And Change
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