A5004079337- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Climate Change Policy and Economics
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Cryospheric studies and observations
- Climate Change and Health Impacts
- Meteorological Phenomena and Simulations
- Climate Change and Geoengineering
- Global Energy and Sustainability Research
- Urban Heat Island Mitigation
- Air Quality Monitoring and Forecasting
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Carbon Dioxide Capture Technologies
- Energy, Environment, and Transportation Policies
- Climate change impacts on agriculture
- Plant responses to elevated CO2
- Marine and coastal ecosystems
- Wind and Air Flow Studies
- Crop Yield and Soil Fertility
- Landslides and related hazards
Texas A&M University
2016-2025
Texas A&M University – Central Texas
2024
Environmental Defense Fund
2024
Mitchell Institute
2023-2024
Powerchina Huadong Engineering Corporation (China)
2024
Zhengzhou University of Industrial Technology
2024
Anhui University of Science and Technology
2022-2023
Texas A&M University System
2023
China Agricultural University
2021-2023
Tianjin University
2023
Black carbon (BC) is functionally defined as the absorbing component of atmospheric total carbonaceous aerosols (TC) and typically dominated by soot-like elemental (EC). However, organic (OC) has also been shown to absorb strongly at visible UV wavelengths organics are referred brown (BrC), which not represented in climate models. We propose an observationally based analytical method for rigorously partitioning measured absorption aerosol optical depths (AAOD) single scattering albedo (SSA)...
Abstract Methane mitigation is essential for addressing climate change, but the value of rapidly implementing available measures not well understood. In this paper, we analyze benefits fast action to reduce methane emissions as compared slower and delayed timelines. We find that scale up deployment greatly underutilized will have significant near-term temperature beyond from slow or action. Overall, strategies exist cut global human activities in half within next ten years these currently...
Abstract. The Paris Agreement of December 2015 stated a goal to pursue efforts keep global temperatures below 1.5 °C above preindustrial levels and well 2 °C. IPCC was charged with assessing climate impacts at these temperature levels, but fully coupled equilibrium simulations do not currently exist inform such assessments. In this study, we produce set scenarios using simple model designed achieve long-term in stable climate. These are then used century-scale ensemble the Community Earth...
Abstract Though highly motivated to slow the climate crisis, governments may struggle impose costly polices on entrenched interest groups, resulting in a greater need for negative emissions. Here, we model wartime-like crash deployment of direct air capture (DAC) as policy response calculating funding, net CO 2 removal, and impacts. An emergency DAC program, with investment 1.2–1.9% global GDP annually, removes 2.2–2.3 GtCO yr –1 2050, 13–20 2075, 570–840 cumulatively over 2025–2100....
The historic Paris Agreement calls for limiting global temperature rise to "well below 2 °C." Because of uncertainties in emission scenarios, climate, and carbon cycle feedback, we interpret the terms three climate risk categories bring considerations low-probability (5%) high-impact (LPHI) warming addition central (∼50% probability) value. current category dangerous is extended more categories, which are defined by us here as follows: >1.5 °C dangerous; >3 catastrophic; >5 unknown, implying...
Abstract The Asian monsoon (AM) played an important role in the dynastic history of China, yet it remains unknown whether AM-mediated shifts Chinese societies affect earth surface processes to point exceeding natural variability. Here, we present a dust storm intensity record dating back first unified dynasty China (the Qin Dynasty, 221–207 B.C.E.). Marked increases activity coincided with dynasties large populations during strong AM periods. By contrast, reduced corresponded decreased...
Abstract Anthropogenic aerosol (AA) forcing has been shown as a critical driver of climate change over Asia since the mid-20th century. Here we show that almost all Coupled Model Intercomparison Project Phase 6 (CMIP6) models fail to capture observed dipole pattern optical depth (AOD) trends during 2006–2014, last decade CMIP6 historical simulation, due an opposite trend eastern China compared with observations. The incorrect AOD is attributed problematic AA emissions adopted by CMIP6. There...
Significance This study clarifies the need for comprehensive CO 2 and non-CO mitigation approaches to address both near-term long-term warming. Non-CO greenhouse gases (GHGs) are responsible nearly half of all climate forcing from GHG. However, importance pollutants, in particular short-lived has been underrepresented. When historical emissions partitioned into fossil fuel (FF)- non-FF-related sources, we find that positive FF land-use change sources masked by coemission cooling aerosols....
Surface PM2.5 concentrations have significant implications for human health, necessitating accurate estimations. This study compares various machine learning models, including linear tree-based algorithms, and artificial neural networks (ANNs) estimating using the MERRA-2 dataset from 2012 to 2023. Mutual information Spearman cross-feature correlation scores are used during feature selections. The performance of models is evaluated metrics normalized Nash–Sutcliffe efficiency (NNSE), root...
At last, all the major emitters of greenhouse gases (GHGs) have agreed under Copenhagen Accord that global average temperature increase should be kept below 2 °C. This study develops criteria for limiting warming °C, identifies constraints imposed on policy makers, and explores available mitigation avenues. One important criterion is radiant energy added by human activities not exceed 2.5 (range: 1.7–4) watts per square meter (Wm −2 ) Earth's surface. The blanket man-made GHGs has already 3...
Abstract. There is growing international interest in mitigating climate change during the early part of this century by reducing emissions short-lived pollutants (SLCPs), addition to CO2. The SLCPs include methane (CH4), black carbon aerosols (BC), tropospheric ozone (O3) and hydrofluorocarbons (HFCs). Recent studies have estimated that CH4, BC, O3 using available technologies, about 0.5 0.6 °C warming can be avoided mid-21st century. Here we show avoiding production use high-GWP (global...
The rate of increase global-mean precipitation per degree surface temperature differs for greenhouse gas and aerosol forcings across emissions scenarios with differing composition change in forcing. We investigate whether or not the extreme also varies four that force Coupled Model Intercomparison Project, version 5 multimodel ensemble. In most models, maximum annual daily global warming ensemble is statistically indistinguishable scenarios, this calculated globally, over all land,...
Abstract. Himalayan mountain glaciers and the snowpack over Tibetan Plateau provide headwater of several major rivers in Asia. In situ observations snow cover extent since 1960s suggest that region have retreated significantly, accompanied by a surface warming 2–2.5 °C observed peak altitudes (5000 m). Using high-resolution ocean–atmosphere global climate model an observationally constrained black carbon (BC) aerosol forcing, we attribute altitude dependence trends as well spatial pattern...
Aridity, defined as the ratio of precipitation (P) to potential evapotranspiration (PET) over land, is critical natural ecosystems and agricultural production. Global climate models project global decreases P/PET (drying) in 21st century. We examine uncertainty aridity projections due scenarios greenhouse gases (GHGs) aerosols with three sets ensemble simulations from a single model, Community Earth System Model (CESM1). Ensembles consist two Radiative Concentration Pathways (RCPs) scenario...
Abstract The 2015 Paris Agreement aims to limit global warming below 2 °C and pursue efforts even it 1.5 relative pre-industrial levels. Decision makers need reliable information on the impacts caused by these levels for climate mitigation adaptation measures. We explore changes in extremes, which are closely tied economic losses casualties, under their scenario dependence using three sets of ensemble model simulations. A 0.5 (from °C) leads significant increases temperature precipitation...
Abstract As the largest emitter in world, China recently pledged to reach a carbon peak before 2030 and neutrality 2060, which could accelerate progress of mitigating negative climate change effects. In this study, we used Minimum Complexity Earth Simulator semi-empirical statistical model quantify global mean temperature sea-level rise (SLR) response under suite emission pathways that are constructed cover various years China. The results show will require reduction rate no less than...
Heat waves and air pollution extremes exert compounding effects on human health food security may worsen under future climate change. On the basis of reconstructed daily O3 levels in China meteorological reanalysis, we found that interannual variability frequency summertime co-occurrence heat wave is regulated mainly by a combination springtime warming western Pacific Ocean, Indian Ross Sea. These sea surface temperature anomalies impose influences precipitation, radiation, etc., to modulate...