Benefits of Recent Clean Air Actions in China on Global Air Quality and Climate Change

2020 ◽  
Author(s):  
Yuqiang Zhang ◽  
Drew Shindell ◽  
Karl Seltzer ◽  
Lu Shen ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Climate Change ◽  
Air Quality ◽  
Global Climate ◽  
Action Plan ◽  
Pollution Prevention ◽  
Developed Countries ◽  
Health Impact ◽  
The Other ◽  
Emission Reductions ◽  
Emission Changes

<p>Significant emission reductions have been observed in China recently, especially after the the ‘Air Pollution Prevention and Control Action Plan’ in 2013. Major air pollutants, such as NOx, CO, SO<sub>2</sub>, are found to reach their peak in 2012 or 2013. Few studies attempted to investigate how the recent emission reductions in China will affect global air quality and climate change. Here, by using global climate-chemistry models and health impact functions, we investigate how the contrasting emission changes in China from 2010 to 2017 will affect global air quality, mortality burden and climate change. We calculate that compared with the year 2010, 4800 deaths were avoided due to ozone reductions in 2017 globally, while 65% of the avoided deaths happen in China, and the other 35% worldwide. In 2017, 109,000 deaths were avoided due to PM<sub>2.5 </sub>reductions, while 92% of the avoided deaths happen in China, and the other 8% worldwide. We also find that the cooling effect from the emission reductions of SO<sub>2</sub> in China has been compensated by the warming effect from the emission reductions of black carbon at the same time in China, which is the opposite trend as found in the developed countries in previous decades.</p>

scholarly journals The role of climate and emission changes in future air quality over southern Canada and northern Mexico

2008 ◽  
Vol 8 (1) ◽  
pp. 3405-3430
Author(s):  
E. Tagaris ◽  
K.-J. Liao ◽  
K. Manomaiphiboon ◽  
S. He ◽  
J.-H. Woo ◽  
...  
Keyword(s):  
Climate Change ◽  
Air Quality ◽  
Global Climate Change ◽  
Global Climate ◽  
Western Canada ◽  
Eastern Canada ◽  
Northern Mexico ◽  
Pollutant Concentrations ◽  
Emission Changes ◽  
Future Emissions

Abstract. Potential impacts of global climate and emissions changes on regional air quality over southern (western and eastern) Canada and northern Mexico are examined by comparing future summers' (i.e., 2049–2051) average regional O3 and PM2.5 concentrations with historic concentrations (i.e., 2000–2002 summers). Air quality modeling was conducted using CMAQ and meteorology downscaled from the GISS-GCM using MM5. Emissions for North America are found using US EPA, Mexican and Canadian inventories and projected emissions following CAIR and IPCC A1B emissions scenario. Higher temperatures for all sub-regions and regional changes in mixing height, insolation and precipitation are forecast in the 2049–2051 period. Future emissions are calculated to be lower over both Canadian sub-regions, but higher over northern Mexico. Global climate change, alone, is predicted to affect PM2.5 concentrations more than O3: M8hO3 concentrations are estimated to be slightly different in all examined sub-regions while PM2.5 concentrations are estimated to be higher over both Canadian sub-regions (8% over western and 3% over eastern) but 11% lower over northern Mexico. Climate change combined with the projected emissions lead to greater change in pollutant concentrations: M8hO3 concentrations are simulated to be 6% lower over western Canada and 8% lower over eastern Canada while PM2.5 concentrations are simulated to be 5% lower over western Canada and 11% lower over eastern Canada. Although future emissions over northern Mexico are projected higher, pollutant concentrations are simulated to be lower due to US emissions reductions. Global climate change combined with the projected emissions will decrease M8hO3 4% and PM2.5 17% over northern Mexico.

scholarly journals Assessment of Emission Reduction and Meteorological Change in PM2.5 and Transport Flux in Typical Cities Cluster during 2013–2017

2021 ◽  
Vol 13 (10) ◽  
pp. 5685
Author(s):  
Panbo Guan ◽  
Hanyu Zhang ◽  
Zhida Zhang ◽  
Haoyuan Chen ◽  
Weichao Bai ◽  
...  
Keyword(s):  
Air Quality ◽  
Action Plan ◽  
Influence Factors ◽  
Pollution Prevention ◽  
Weather Conditions ◽  
Yangtze River Delta ◽  
Control Measures ◽  
Joint Control ◽  
Air Quality Model ◽  
Quality Model

Under the Air Pollution Prevention and Control Action Plan (APPCAP) implemented, China has witnessed an air quality change during the past five years, yet the main influence factors remain relatively unexplored. Taking the Beijing-Tianjin-Hebei (BTH) and Yangtze River Delta (YRD) regions as typical cluster cities, the Weather Research Forecasting (WRF) and Comprehensive Air Quality Model with Extension (CAMx) were introduced to demonstrate the meteorological and emission contribution and PM2.5 flux distribution. The results showed that the PM2.5 concentration in BTH and YRD significantly declined with a descend ratio of −39.6% and −28.1%, respectively. For the meteorological contribution, those regions had a similar tendency with unfavorable conditions in 2013–2015 (contribution concentration 1.6–3.8 μg/m3 and 1.1–3.6 μg/m3) and favorable in 2016 (contribution concentration −1.5 μg/m3 and −0.2 μg/m3). Further, the absolute value of the net flux’s intensity was positively correlated with the degree of the favorable/unfavorable weather conditions. When it came to emission intensity, the total net inflow flux increased, and the outflow flux decreased significantly across the border with the emission increasing. In short: the aforementioned results confirmed the effectiveness of the regional joint emission control and provided scientific support for the proposed effective joint control measures.

International Governance on Carbon Tariff and Its Vacuum in International Regime

2013 ◽  
Vol 01 (01) ◽  
pp. 1350008 ◽  
Author(s):  
Mou WANG
Keyword(s):  
Climate Change ◽  
Developing Countries ◽  
International Trade ◽  
Global Climate ◽  
Developed Countries ◽  
International Governance ◽  
International Consensus ◽  
Climate Governance ◽  
Emission Quota ◽  
Carbon Tariff

Drawing on the idea that countries are eligible to implement differentiated emission reduction policies based on their respective capabilities, some parties of UNFCCC attempt to weaken the principle of “Common but differentiated responsibilities(CBDR)” and impose carbon tariff on international trade. This initiative is in fact another camouflage to burden developing countries with emission cut obligation, which has no doubt undermined the development rights of developing countries. This paper defines Carbon Tariff as border measures that target import goods with embodied carbon emission. It can be import tariffs or other domestic tax measures that adjust border tax, which includes plain import tariffs and export rebates, border tax adjustment, emission quota and permit etc. For some developed countries, carbon tariffs mean to sever trade protectionism and to build trade barriers. Its theoretical arguments like “loss of comparative advantage”, “carbon leakage decreases environmental effectiveness” and “theoretical model bases” are pseudo-propositions without international consensus. Carbon tariff has become an intensively debated issue due to its duality of climate change and trade, but neither UNFCCC nor WTO has clarified this issue or has indicated a clear statement in this regard. As a result, it allows some parties to take advantage of this loophole and escape its international climate change obligation. Carbon tariff is an issue arising from global climate governance. To promote the cooperation of global climate governance and safeguard the social and economic development of developing countries, a fair and justified climate change regime and international trade institution should be established, and the settlement of the carbon tariff issue should be addressed within these frameworks. This paper argues that the international governance of carbon tariff should in cooperation with other international agreements; however, principles and guidelines regarding this issue should be developed under the UNFCCC. Based on these principles and guidelines, WTO can develop related technical operation provisions.

scholarly journals Impacts of future climate change and effects of biogenic emissions on surface ozone and particulate matter concentrations in US

2011 ◽  
Vol 11 (1) ◽  
pp. 2183-2231 ◽  
Author(s):  
Y. F. Lam ◽  
J. S. Fu ◽  
S. Wu ◽  
L. J. Mickley
Keyword(s):  
Climate Change ◽  
United States ◽  
Air Quality ◽  
Global Climate Change ◽  
Global Climate ◽  
Future Climate Change ◽  
Biogenic Emissions ◽  
Emissions Reduction ◽  
Annual Average ◽  
Future Emissions

Abstract. Simulations of present and future average regional ozone and PM2.5 concentrations over the United States were performed to investigate the potential impacts of global climate change and emissions on regional air quality using CMAQ. Various emissions and climate conditions with different biogenic emissions and domain resolutions were implemented to study the sensitivity of future air quality trends from the impacts of changing biogenic emissions. A comparison of GEOS-Chem and CMAQ was performed to investigate the effect of downscaling on the prediction of future air quality trends. For ozone, the impacts of global climate change are relatively smaller when compared to the impacts of anticipated future emissions reduction, except for the Northeast area, where increasing biogenic emissions due to climate change have stronger positive effects (increases) to the regional ozone air quality. The combination effect from both climate change and emission reductions leads to approximately a 10% or 5 ppbv decrease of the maximum daily average eight-hour ozone (MDA8) over the Eastern United States. For PM2.5, the impacts of global climate change have shown insignificant effect, where as the impacts of anticipated future emissions reduction account for the majority of overall PM2.5 reductions. The annual average 24-h PM2.5 of the future-year condition was found to be about 40% lower than the one from the present-year condition, of which 60% of its overall reductions are contributed to by the decrease of SO4 and NO3 particulate matters. Changing the biogenic emissions model increases the MDA8 ozone by about 5–10% or 3–5 ppbv in the Northeast area. Conversely, it reduces the annual average PM2.5 by 5% or 1.0 μg/m3 in the Southeast region.

scholarly journals The risk of carbon leakage in global climate agreements

2020 ◽  
Author(s):  
Tobias Nielsen ◽  
Nicolai Baumert ◽  
Astrid Kander ◽  
Magnus Jiborn ◽  
Viktoras Kulionis
Keyword(s):  
Climate Change ◽  
Kyoto Protocol ◽  
Global Climate ◽  
Developed Countries ◽  
Carbon Leakage ◽  
Policy Makers ◽  
Climate Agreements ◽  
Climate Action ◽  
The Usa ◽  
Nationally Determined Contributions

Abstract Although climate change and international trade are interdependent, policy-makers often address the two topics separately. This may inhibit progress at the intersection of climate change and trade and could present a serious constraint for global climate action. One key risk is carbon leakage through emission outsourcing, i.e. reductions in emissions in countries with rigorous climate policies being offset by increased emissions in countries with less stringent policies. We first analyze the Paris Agreement’s nationally determined contributions (NDC) and investigate how carbon leakage is addressed. We find that the risk of carbon leakage is insufficiently accounted for in these documents. Then, we apply a novel quantitative approach (Jiborn et al., 2018; Baumert et al., 2019) to analyze trends in carbon outsourcing related to a previous international climate regime—the Kyoto Protocol—in order to assess whether reported emission reductions were offset by carbon outsourcing in the past. Our results for 2000–2014 show a more nuanced picture of carbon leakage during the Kyoto Protocol than previous studies have reported. Carbon outsourcing from developed to developing countries was dominated by the USA outsourcing to China, while the evidence for other developed countries was mixed. Against conventional wisdom, we find that, in general, countries that stayed committed to their Kyoto Protocol emission targets were either only minor carbon outsourcers or actually even insourcers—although the trend was slightly negative—indicating that binding emissions targets do not necessarily lead to carbon outsourcing. We argue that multiple carbon monitoring approaches are needed to reduce the risk of carbon leakage.

scholarly journals Downscaling a global climate model to simulate climate change over the US and the implication on regional and urban air quality

2013 ◽  
Vol 6 (5) ◽  
pp. 1429-1445 ◽  
Author(s):  
M. Trail ◽  
A. P. Tsimpidi ◽  
P. Liu ◽  
K. Tsigaridis ◽  
Y. Hu ◽  
...  
Keyword(s):  
Climate Change ◽  
Air Quality ◽  
Climate Model ◽  
Global Climate ◽  
Global Climate Model ◽  
Regional Climate ◽  
Climate Conditions ◽  
Southeastern Us ◽  
The Us ◽  
Ozone Levels

Abstract. Climate change can exacerbate future regional air pollution events by making conditions more favorable to form high levels of ozone. In this study, we use spectral nudging with the Weather Research and Forecasting (WRF) model to downscale NASA earth system GISS modelE2 results during the years 2006 to 2010 and 2048 to 2052 over the contiguous United States in order to compare the resulting meteorological fields from the air quality perspective during the four seasons of five-year historic and future climatological periods. GISS results are used as initial and boundary conditions by the WRF regional climate model (RCM) to produce hourly meteorological fields. The downscaling technique and choice of physics parameterizations used are evaluated by comparing them with in situ observations. This study investigates changes of similar regional climate conditions down to a 12 km by 12 km resolution, as well as the effect of evolving climate conditions on the air quality at major US cities. The high-resolution simulations produce somewhat different results than the coarse-resolution simulations in some regions. Also, through the analysis of the meteorological variables that most strongly influence air quality, we find consistent changes in regional climate that would enhance ozone levels in four regions of the US during fall (western US, Texas, northeastern, and southeastern US), one region during summer (Texas), and one region where changes potentially would lead to better air quality during spring (Northeast). Changes in regional climate that would enhance ozone levels are increased temperatures and stagnation along with decreased precipitation and ventilation. We also find that daily peak temperatures tend to increase in most major cities in the US, which would increase the risk of health problems associated with heat stress. Future work will address a more comprehensive assessment of emissions and chemistry involved in the formation and removal of air pollutants.

scholarly journals Soil Pollution Management in China: A Brief Introduction

2019 ◽  
Vol 11 (3) ◽  
pp. 556 ◽  
Author(s):  
Tiankui Li ◽  
Yi Liu ◽  
Sijie Lin ◽  
Yangze Liu ◽  
Yunfeng Xie
Keyword(s):  
Soil Pollution ◽  
Management System ◽  
Agricultural Land ◽  
Action Plan ◽  
Risk Control ◽  
Pollution Prevention ◽  
Soil Management ◽  
Developed Countries ◽  
Control Rules ◽  
Pollution Management

Soil pollution has become a severe environmental issue in China over the past few decades due to rapid industrialization and urbanization. However, traditionally, few laws and regulations have focused on soil pollution in China. In response to this emerging threat, new policies, regulations, and measures have been proposed and implemented in recent years. This paper summarizes the existing law, action plan, regulations, and risk control rules regarding soil pollution prevention in China. Moreover, it compares soil pollution management between China and other developed countries. China has now established a comprehensive soil management system based on risk-based control. Regulations have been formulated for agricultural land, contaminated land, and industrial and mining land. Separate risk control rules exist for agricultural land and development land. Agricultural land can be classified as priority protection, safe utilization, and strict management with respect to soil pollution levels and agricultural products. The risk control rules for development land set different standards for sensitive land and non-sensitive land. Comparisons with developed countries show that their experiences of risk-based control and the “polluter pays” principle have been adopted in China. Additional scientific research and public participation are recommended for future updates to these policies. This study provides a comprehensive introduction to the newly established soil management system in China.

Promoting Green and Low-Carbon Development to Address Challenges of Climate Change

2017 ◽  
Vol 05 (02) ◽  
pp. 1750008
Author(s):  
Zhenhua XIE
Keyword(s):  
Climate Change ◽  
Global Climate ◽  
Developed Countries ◽  
Low Carbon ◽  
Address Climate Change ◽  
Development Path ◽  
International Obligation ◽  
Key Concepts ◽  
Low Carbon Development ◽  
Major Progress

A general consensus has been developed to proactively address climate change and promote green and low-carbon development in the international community. China, as a responsible major developing country, takes green and low-carbon development not only as its due international obligation to tackle global climate change, but also a priority in the implementation of the “Five Key Concepts for Development” ( http://keywords.china.org.cn/2016-03/01/content_37907679.htm ) and the realization of the “Two Centenary Goals” ( http://www.china.org.cn/china/china_key_words/2014-11/18/content_34158771.htm ). In this paper, the author reviews the major progress in tackling climate change worldwide in recent years, explores the nature of climate change based on the experiences of developed countries and China’s choice of development path, and analyzes China’s achievements and future development potential in green and low-carbon development.

SADC’s response to climate change – the role of harmonised law and policy on mitigation in the energy sector

2014 ◽  
Vol 25 (1) ◽  
pp. 26-32 ◽  
Author(s):  
M. Barnard
Keyword(s):  
Climate Change ◽  
Global Climate Change ◽  
Global Climate ◽  
Action Plan ◽  
Ghg Emissions ◽  
Energy Sector ◽  
Literature Study ◽  
Member States ◽  
Law And Policy

The negligible levels of energy-related GHG emissions attributable to the Southern African sub-region translates into the sub-region contributing relatively little towards global climate change. Notwithstanding, the member states comprising the Southern African Development Community (SADC) are among the most vulnerable to the trans boundary effects of global climate change. Existing SADC climate change policy documents highlight the important role of the energy sector in climate change mitigation. Furthermore, various international, African Union and SADC legal instruments stress the crucial role of harmonised law and policy as climate change adaptive measure. It is the central hypothesis of this paper that harmonised sub-regional law and policy aimed at regulating SADC member states’ mitigation efforts in the energy sector is a crucial climate change adaptive strategy. This hypothesis is based on the mandates for the formulation of a SADC climate change action plan and for mitigation in the energy sector. These mandates are contained in the texts of the SADC-CNGO Climate Change Agenda, 2012 and the Southern Africa Sub - Regional Framework on Climate Change, 2010 respectively. It is the main aim of this paper to investigate recent developments in the formulation of harmonised SADC law and policy on climate change in general and law and policy pertaining to mitigation in the energy sector specifically. In achieving the stated aim, themes to be investigated by means of a literature study are those of energy-related greenhouse gas emissions and global climate change and harmonised sub-regional policy on mitigation in the energy sector as adaptive measure in the SADC.

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