A5051549321- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Climate variability and models
- Atmospheric Ozone and Climate
- Cryospheric studies and observations
- Calibration and Measurement Techniques
- Precipitation Measurement and Analysis
- Monetary Policy and Economic Impact
- Wind and Air Flow Studies
- Fiscal Policy and Economic Growth
- Spectroscopy and Laser Applications
- Plant Water Relations and Carbon Dynamics
- Aeolian processes and effects
- Economic Theory and Policy
- Global Financial Crisis and Policies
- Tropical and Extratropical Cyclones Research
- Arctic and Antarctic ice dynamics
- Economic Growth and Productivity
- Fiscal Policies and Political Economy
- Soil Moisture and Remote Sensing
- Geophysics and Gravity Measurements
- Solar Radiation and Photovoltaics
- Fire effects on ecosystems
NOAA Earth System Research Laboratory
2016-2025
NOAA Global Systems Laboratory
2020-2025
Atmospheric and Environmental Research
2003-2024
Organisation de Coopération et de Développement Economiques
2015-2024
National Oceanic and Atmospheric Administration
2015-2024
Princeton University
2024
Neuroscience Institute
2024
Jet Propulsion Laboratory
2024
Joint Research Centre
2023
Centre for Policy Studies
2018-2023
1. An Up-Dated Viewpoint: Cell Means Models. 2. Basic Results for Models: The 1-Way Classification. 3. Nested Classifications. 4. 2-Way Crossed Classification with All-Cells-Filled Data: 5. Some-Cell Empty 6. Models Covariables (Analysis of Covariance): the 7. Matrix Algebra and Quadratic Forms ( A Prelude to Chapter 8). 8. General Linear Model. 9. Classification: Overparameterized 10. Extended 11. Covariables: Case Some Applications. 12. Comments on Computing Packages. 13. Mixed Thumbnail...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Ground-based two-channel microwave radiometers (MWRs) have been used for over 15 years by the Atmospheric Radiation Measurement (ARM) program to provide observations of downwelling emitted radiance from which precipitable water vapor (PWV) and liquid path (LWP)—two geophysical parameters critical many areas atmospheric research—are retrieved. An algorithm that incorporates output two advanced...
Abstract Results are presented from an intercomparison of single‐column and cloud‐resolving model simulations a cold‐air outbreak mixed‐phase stratocumulus cloud observed during the Atmospheric Radiation Measurement (ARM) programme's Mixed‐Phase Arctic Cloud Experiment. The occurred in well‐mixed boundary layer with cloud‐top temperature − 15 °C. average liquid water path around 160 g m −2 was about two‐thirds adiabatic value far greater than mass ice which when integrated surface to top ....
The Mixed-Phase Arctic Cloud Experiment (M-PACE) was conducted from 27 September through 22 October 2004 over the Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) on North Slope Alaska. primary objectives were to collect a dataset suitable study interactions between microphysics, dynamics, and radiative transfer in mixed-phase clouds, develop/evaluate cloud property retrievals surface-and satellite-based remote sensing instruments. Observations...
A comprehensive dataset of microphysical and radiative properties aerosols clouds in the boundary layer vicinity Barrow, Alaska, was collected April 2008 during Indirect Semi-Direct Aerosol Campaign (ISDAC). ISDAC's primary aim to examine effects aerosols, including those generated by Asian wildfires, on that contain both liquid ice. ISDAC utilized Atmospheric Radiation Measurement Pro- gram's permanent observational facilities at Barrow specially deployed instruments measuring aerosol, ice...
Accurate observations of cloud microphysical properties are needed for evaluating and improving the representation processes in climate models better estimate Earth radiative budget. However, large differences found current products retrieved from ground‐based remote sensing measurements using various retrieval algorithms. Understanding is an important step to address uncertainties retrievals. In this study, in‐depth analysis nine existing retrievals ARM carried out. We place emphasis on...
Abstract The central Great Plains region in North America has a nocturnal maximum warm-season precipitation. Much of this precipitation comes from organized mesoscale convective systems (MCSs). This is counterintuitive the sense that activity over out phase with local generation CAPE by solar heating surface. lower troposphere environment typically characterized low-level jet (LLJ) just above stable boundary layer (SBL), and available potential energy (CAPE) values peak SBL, resulting...
Abstract Within the framework of international field campaign COPS (Convective and Orographically‐induced Precipitation Study), a large suite state‐of‐the‐art meteorological instrumentation was operated, partially combined for first time. This includes networks in situ remote‐sensing systems such as Global Positioning System well synergy multi‐wavelength passive active instruments advanced radar lidar systems. The phase performed from 01 June to 31 August 2007 low‐mountain area southwestern...
Abstract The Greenland ice sheet has become one of the main contributors to global sea level rise, predominantly through increased meltwater runoff. drivers runoff, however, remain poorly understood. Here we show that clouds enhance runoff by about one-third relative clear skies, using a unique combination active satellite observations, climate model data and snow simulations. This impact results from cloud radiative effect 29.5 (±5.2) W m −2 . Contrary conventional wisdom, responds this...
Abstract. The Climate Research Facility of the US Department Energy's Atmospheric Radiation Measurement (ARM) Program operates a network ground-based microwave radiometers. Data and retrievals from these instruments have been available to scientific community for almost 20 yr. In past five years has expanded include total 22 radiometers deployed in various locations around world. new cover frequency range between 197 GHz are consistently automatically calibrated. latest addition is...
Abstract The High-Resolution Rapid Refresh (HRRR) is a convection-allowing implementation of the Advanced Research version Weather and Forecasting (WRF-ARW) Model with hourly data assimilation that covers conterminous United States Alaska runs in real time at NOAA/National Centers for Environmental Prediction (NCEP). Implemented operationally NOAA/NCEP 2014, HRRR features 3-km horizontal grid spacing frequent forecasts (hourly CONUS 3-hourly Alaska). initialization designed optimal...
Abstract A grand challenge from the wind energy industry is to provide reliable forecasts on mountain winds several hours in advance at microscale (∼100 m) resolution. This requires better wind-energy physics included forecasting tools, for which field observations are imperative. While mesoscale (∼1 km) measurements abound, processes not monitored practice nor do plentiful exist this scale. After a decade of preparation, group European and U.S. collaborators conducted campaign during 1...
Atmospheric radiative forcing, surface radiation budget, and top-of-the-atmosphere radiance interpretation involve knowledge of the vertical height structure overlying cloud aerosol layers. During last decade, U.S. Department Energy, through Radiation Measurement (ARM) program, has constructed four long-term atmospheric observing sites in strategic climate regimes (north-central Oklahoma; Barrow, Alaska; Nauru Manus Islands tropical western Pacific). Micropulse lidar (MPL) systems provide...
Thousands of comparisons between total precipitable water vapor (PWV) obtained from radiosonde (Vaisala RS80-H) profiles and PWV retrieved a collocated microwave radiometer (MWR) were made at the Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains Cloud Testbed (SGP CART) site in northern Oklahoma 1994 to 2000. These show that RS80-H has an approximate 5% dry bias compared MWR. This observation is consistent with interpretations Vaisala RS80 data during Tropical Ocean...
We describe an operational, self-contained, fully autonomous Raman lidar system that has been developed for unattended, around-the-clock atmospheric profiling of water vapor, aerosols, and clouds. During a 1996 three-week intensive observational period, the operated during all periods good weather (339 out 504 h), including one continuous five-day period. The is based on dual-field-of-view design provides excellent daytime capability without sacrificing nighttime performance. It computer...
Many of the clouds important to Earth's energy balance, from Tropics Arctic, contain small amounts liquid water. Longwave and shortwave radiative fluxes are very sensitive perturbations cloud water path (LWP), when LWP is (i.e., < 100 g m−2; with less than this threshold will be referred as "thin"). Thus, properties these thin must well understood capture them correctly in climate models. We review importance explain difficulties observing them. In particular, because thin, potentially mixed...
The phase composition and microphysical structure of clouds define the manner in which they modulate atmospheric radiation contribute to hydrologic cycle. Issues regarding cloud partitioning transformation come bear directly mixed-phase clouds, have been difficult address within current modeling frameworks. Ground-based, remote-sensing observations can a significant body knowledge with better understand, thereby more accurately model, their phase-defining processes. Utilizing example from...
An assessment of aerosol‐cloud interactions (ACI) from ground‐based remote sensing under coastal stratiform clouds is presented. The utilizes a long‐term, high temporal resolution data set the Atmospheric Radiation Measurement (ARM) Program deployment at Pt. Reyes, California, United States, in 2005 to provide statistically robust measures ACI and characterize variability based on environmental conditions observational approaches. average N (= dln d /dln α , change cloud drop number...
The Autonomous Modular Scanner, onboard the Ikhana remotely operated aircraft, captured fires over Basin Fire Complex in Monterey County, California, on 8 July 2008.The image has been overlaid onto terrain data within Google Earth to provide additional information fire managers effects of behavior.The yellow areas depict active areas, with reds and purples showing burned-over areas.