A5084752191- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Oceanographic and Atmospheric Processes
- Atmospheric chemistry and aerosols
- Tropical and Extratropical Cyclones Research
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Marine and coastal ecosystems
- Urban Heat Island Mitigation
- Plant Water Relations and Carbon Dynamics
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Traffic Prediction and Management Techniques
- Geophysics and Gravity Measurements
- Manufacturing Process and Optimization
- Climate Change Policy and Economics
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Seismic Waves and Analysis
- Environmental and Agricultural Sciences
- Traffic control and management
- Ocean Waves and Remote Sensing
Florida State University
2016-2025
University of Maryland, College Park
1991-2024
Georgia Institute of Technology
2015-2024
Shenyang Institute of Computing Technology (China)
2024
Shanghai University of Medicine and Health Sciences
2024
University of Chinese Academy of Sciences
2024
Beijing Forestry University
2022-2024
Key Laboratory of Guangdong Province
2024
Academe of Grassland And Animal Science
2024
Yellow River Institute of Hydraulic Research
2023
Abstract Polar surface temperatures are expected to warm 2–3 times faster than the global-mean temperature: a phenomenon referred as polar warming amplification. Therefore, understanding individual process contributions is critical global climate sensitivity. The Coupled Feedback Response Analysis Method (CFRAM) applied decompose annual- and zonal-mean vertical temperature response within transient 1% yr−1 CO2 increase simulation of NCAR Community Climate System Model, version 4 (CCSM4),...
This paper documents various unresolved issues in using surface temperature trends as a metric for assessing global and regional climate change. A series of examples ranging from errors caused by measurements at monitoring station to the undocumented biases regionally globally averaged time are provided. The poorly understood or documented relate micrometeorological impacts due warm bias nighttime minimum temperatures, poor siting instrumentation, effect winds well atmospheric water vapor...
The IPCC AR4 global warming climate simulations reveal a pronounced seasonality of polar amplification with maximum in winter and minimum summer. In this paper, we study the relative importance surface albedo feedback (SAF), changes cloud radiative forcing (CRF), sensible latent heat fluxes, storage, clear‐sky downward infrared radiation causing strong by calculating partial temperature due to each these processes using energy budget equation. main thermodynamic factor for small summer is...
Understanding the cloud response to sea ice change is necessary for modeling Arctic climate. Previous work has primarily addressed this problem from interannual variability perspective. This paper provides a refined perspective of ice-cloud relationship in using satellite footprint-level quantification covariance between and low properties NASA A-Train active remote sensing data. The covariances concentration are quantified by first partitioning each footprint into four atmospheric regimes...
A local quasi-geostrophic energetics analysis indicates that within the jet core, low-frequency (LF) eddies behave baroclinically essentially same as high-frequency (HF) eddies. They both have a westward tilting vertical structure and grow by transporting heat poleward converting eddy potential energy to kinetic energy. However, difference in horizontal orientations of HF LF has several important implications their amplitude peak locations, well interaction with stationary waves. The...
Sensitivity of surface climate change to land types is investigated for the Northern Hemisphere by subtracting reanalysis from observed temperature (OMR). The basis this approach that while represents large‐scale changes due greenhouse gases and atmospheric circulation, it less sensitive regional processes associated with types. OMR trends derived two independent reanalyses (ERA40 NNR) observations (CRU GHCN) show similar dependence upon types, suggesting attribution OMRs different robust....
It is hypothesized that the low-frequency planetary scale waves and high-frequency cyclone-scale in an equilibrated state of atmosphere are symbiotically dependent upon one another. This demonstrated with analysis a dissipative atmospheric model driven by zonally symmetric forcing. Under geophysically relevant parameter condition, synoptic this system intermittently extract sufficient amount energy from modified instantaneous zonal flow to compensate not only for their own loss but also net...
This paper investigates the modal and nonmodal instability of a barotropic jet streak. The normal mode analysis reveals that all unstable modes are either stationary or propagating local modes. more localized is, dominant would be. An exact energetics shows energy generation rate depends upon structure disturbance basic deformation field. redistribution processes mechanical work done by ageostrophic pressure advection flow. They affect not only phase speed but also growth virtue zonal...
This paper presents theoretical and modeling evidence suggesting that the atmospheric poleward heat transport can lead to a polar warming amplification (i) by redistributing part of extra energy intercepted low‐latitude atmosphere high latitudes, (ii) strengthening water vapor feedback in latitudes. For an anthropogenic radiative forcing 4 Wm −2 , we illustrate dynamical amplifier contributes about 1/4 (1/10) total high‐latitude (global) surface winter simple coupled atmosphere‐surface moist...
The objective of this research is to determine whether poorly sited long-term surface temperature monitoring sites have been adjusted in order provide spatially representative independent data for use regional and global analyses. We present detailed analyses that demonstrate the lack independence when they are using homogenization procedures employed past studies, as well discuss uncertainties associated with undocumented station moves. simulation mathematics effect trend on adjustments...
We use the “observation minus reanalysis” difference (OMR) method to estimate impact of land‐use changes by computing between trends surface temperature observations (which reflect all sources climate forcing, including effects) and NCEP‐NCAR reanalysis temperatures (only influenced assimilated atmospheric trends). This includes not only urbanization effects but also in agricultural practices, such as irrigation deforestation, well other near‐surface forcings related industrialization,...
The “observation minus reanalysis” (OMR) method has been used to estimate the impact of changes in land use (including urbanization and agricultural practices such as irrigation) by computing difference between trends surface observations (which reflect all sources climate forcing, including effects) NCEP/NCAR reanalysis only contains forcings influencing assimilated atmospheric trends). In this paper we apply OMR stations Argentina for period 1961–2000. contrast most other areas, over there...
Abstract This study investigates the dynamical linkage between meridional mass circulation and cold air outbreaks using ERA-Interim data covering period 1979–2011. It is found that onset date of continental-scale coincides well with peak time stronger events, when net transport across 60°N in warm or branch exceeds ~88 × 109 kg s−1. During weaker events below ~71.6 s−1, most areas midlatitudes are generally mild conditions except northern part western Europe. Composite patterns anomalies...
Abstract Using the climate feedback response analysis method, authors examine individual contributions of CO2 radiative forcing and feedbacks to magnitude, spatial pattern, seasonality transient surface warming in a 1% yr−1 increase simulation NCAR Community Climate System Model, version 4 (CCSM4). The water vapor warm everywhere throughout year. tropical is predominantly caused by feedback, while evaporation reduces warming. Most exhibit noticeable seasonal variations; however, their net...
The emergent constraint approach is a way of using multi-model ensembles to identify the linkage between current/past climate variability and future changes, which has been widely used for narrowing down uncertainty projections change. Climate models latest Coupled Model Intercomparison Project Phase 6 (CMIP6) show much stronger Arctic warming signal but with larger inter-model spread. In this study, we find that projected made by multi-models in CMIP6 positively correlated simulated global...