A5046135618- Tropical and Extratropical Cyclones Research
- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Ocean Waves and Remote Sensing
- Geological and Geophysical Studies
- Arctic and Antarctic ice dynamics
- Precipitation Measurement and Analysis
- Oceanographic and Atmospheric Processes
- Climate variability and models
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Earthquake Detection and Analysis
- Geophysics and Gravity Measurements
- Air Quality and Health Impacts
- Aeolian processes and effects
- Wind and Air Flow Studies
- Cyclone Separators and Fluid Dynamics
- Climate Change Communication and Perception
- Seismology and Earthquake Studies
- Ocean Acidification Effects and Responses
- Global Energy and Sustainability Research
- Impact of Light on Environment and Health
- Infrared Target Detection Methodologies
- Planetary Science and Exploration
Colorado State University
2013-2024
Cooperative Institute for Research in Environmental Sciences
2017-2021
Desert Research Institute
2011-2013
University of Colorado Boulder
2006
University of Colorado System
2001
[1] Measurements are presented showing the presence of biological material within frequent dust storms in western United States. Previous work has indicated that particles were enhancing impact on formation clouds. This paper presents multiple case studies, between April and May 2010, quantifying amount via an Ultraviolet Aerodynamic Particle Sizer during events. All originated Four Corners region Untied States measured at Storm Peak Laboratory, a high elevation facility northwestern...
This article provides a review of tropical cyclone (TC) surface wind estimation from an operational forecasting perspective. First, we provide summary forecast center practices and historical databases. Next, discuss current emerging objective estimates TC winds, including algorithms, archive datasets, individual algorithm strengths weaknesses as applied to parameters. Our leads recommendations about required coverage – area covering at least 1100 km 2-km resolution in the inner-core,...
Abstract Forecasting rapid intensification (RI) of tropical cyclones (TC) is a mission known for large errors. One under-researched factor that affects TC salinity, which important density stratification in certain ocean regions and can affect the surface enthalpy flux under strengthening hurricane. To investigate impact efficacy using salinity information state-of-the-art forecasting, we use statistical model consisting variety machine learning (ML) methods. For data, satellite measurements...
A combined field and laboratory study was conducted to improve our understanding of the chemical hygroscopic properties organic compounds in aerosols sampled background continental atmosphere. PM 2.5 (particles with aerodynamic diameters smaller than µm) were collected from 24 June 28 July 2010 at Storm Peak Laboratory (SPL) Park Range northwestern Colorado. New particle formation (NPF) frequent SPL during this campaign, samples not influenced by regional dust storms. Filter analyzed for...
Abstract The work in this paper builds upon the relatively well-studied seasonal cycle of Indian Ocean heat transport by investigating its interannual variability over a 41-yr period (1958–98). An intermediate, two-and-a-half-layer thermodynamically active ocean model with mixed layer physics is used investigation. results study reveal that possesses strong at all time scales from intraseasonal (10–90 days) to (more than one year). dominates latitudes, amplitude similar cycle, and about...
Abstract Forecasts of tropical cyclone (TC) surface wind structure have recently begun to show some skill, but the number reliable forecast tools, mostly regional hurricane and select global models, remains limited. To provide additional guidance, this work presents development a statistical–dynamical method predict in terms radii, which are defined as maximum extent 34-, 50-, 64-kt (1 kt = 0.514 m s−1) winds geographical quadrants about center storm. The basis for TC size variations is...
This work is devoted to the study of nocturnal low-level jet streams (LLJ) at altitudes up 400 m agl, with help Doppler sodars. The objective was twofold: firstly, origin and behavior LLJ in a mid-latitude region, secondly, compare characteristics over urban rural areas. To this end, simultaneous measurements wind velocity profiles center Moscow city nearby countryside were carried out. sodar data on speed direction collected continuously during 27 days July 2005 analyzed together situ from...
Abstract Visible satellite imagery is widely used by operational weather forecast centers for tropical and extratropical cyclone analysis marine forecasting. The absence of visible at night can significantly degrade capabilities, such as determining center locations or tracking warm-topped convective clusters. This paper documents ProxyVis imagery, an infrared-based proxy daytime developed to address the lack limitations existing nighttime options. was trained on VIIRS day/night band times...
Abstract The National Hurricane Center (NHC) uses a variety of guidance models for its operational tropical cyclone track, intensity, and wind structure forecasts, as baselines the evaluation forecast skill. A set simpler models, collectively known NHC suite, is maintained by NHC. comprising suite are briefly described evaluated, with details provided those that have not been documented previously. Decay-SHIFOR modified version Statistical Intensity Forecast (SHIFOR) model includes decay...
Recent technology advances in miniature microwave radiometers that can be hosted on very small satellites has made possible a new class of affordable constellation missions provide high revisit rates tropical cyclones and other severe weather. The Time-Resolved Observations Precipitation structure storm Intensity with Constellation Smallsats (TROPICS) mission was selected by NASA as part the Earth Venture–Instrument (EVI-3) program is now development planned launch readiness late 2019....
In just the past few years multiple data-driven Artificial Intelligence Weather Prediction (AIWP) models have been developed, with new versions appearing almost monthly. Given this rapid development, applicability of these to operational forecasting has yet be adequately explored and documented. To assess their utility for tropical cyclone (TC) forecasting, NHC verification procedure is used evaluate seven-day track intensity predictions northern hemisphere TCs from May-November 2023. Four...
Determining the location of a tropical cyclone's (TC) surface circulation center -- "center-fixing" is critical first step in TC-forecasting process, affecting current and future estimates track, intensity, structure. Despite recent increase number automated center-fixing methods, only one such method (ARCHER-2) operational, its best performance achieved when using microwave or scatterometer data, which are not available at every forecast cycle. We develop deep-learning algorithm called...
Direct measurement of sub-3 nm particles is crucial for understanding the new particle formation process and its contribution to cloud condensation nuclei (CCN) formation. Sub-3 measured at Long Island, New York (coastal site) Kent, Ohio (inland continental show that high concentrations nighttime were present coastal site only with marine air masses, whereas significantly low in masses inland site. The did not grow larger. Measured sulfuric acid Volatile Organic Compounds (VOCs) indicate...
Abstract While the importance of supermicron particles on human health and climate is well recognized, knowledge their size‐related properties remains elusive. Many routine near‐surface in situ measurements aerosol include size spectra submicron total scattering coefficient at three visible wavelengths two cutoffs. These are collected, for example, U.S. Department Energy's Atmospheric Radiation Measurement (ARM) user facility. Our study illustrates how these conventional can be used to...