Roger A. Pielke Sr.

Roger A. Pielke Sr.
University of Colorado Boulder | CUB

About

688
Publications
97,917
Reads
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43,449
Citations
Citations since 2016
15 Research Items
12025 Citations
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201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500

Publications

Publications (688)
Article
Full-text available
Using two reanalysis datasets on latitude bands of nearly equal area, we analyze the trend of 200 mbar zonal wind anomalies for the period 1958–2021 as well as annual-mean latitude of the zonal mean jet stream. We do not find much change of 200 mbar zonal wind in both two datasets although the increasing trend over the high latitude bands from 45 t...
Article
Full-text available
In order to understand the impact of irrigation on weather and climate, the 2018 Great Plains Irrigation Experiment collected comprehensive observations straddling irrigated and non‐irrigated regions in southeast Nebraska. Using these observations, we examine how irrigation affects diurnal terrain‐generated slope circulations, specifically the slop...
Article
Full-text available
Ecology and the climate provide two perspectives of the same biogeophysical system at all spatiotemporal scales More effectively embracing this congruence is an opportunity to improve scientific understanding and predictions as well as for a more effective policy that integrates both the bottom-up community, business-driven framework, and the popul...
Article
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Risks from human intervention in the climate system are raising concerns with respect to individual species and ecosystem health and resiliency. A dominant approach uses global climate models to predict changes in climate in the coming decades and then to downscale this information to assess impacts to plant communities, animal habitats, agricultur...
Article
Extensive expansion in irrigated agriculture has taken place over the last half century. Due to increased irrigation and resultant land use land cover change, the central United States has seen a decrease in temperature and changes in precipitation during the second half of 20 th century. To investigate the impacts of widespread commencement of irr...
Article
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Research question This paper applies the Sports Governance Observer (SGO) methodology to 47 US Olympic NGBs (National Governing Bodies) of sport and discusses the utility of such constructs. Research methods The SGO methodology was applied to the 47 US Olympic NGBs of sport. This methodology focuses on publicly available information and scores NGB...
Article
The paper addresses a fundamental challenge facing anti-doping regulation in sport: securing scientific integrity. The importance of evidence in anti-doping is similar to that found across many fields where science and expertise meet policy, ethics and regulation. We argue that a growing body of evidence indicates that anti-doping regulation under...
Article
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In April 2018, the International Association of Athletics Federations (IAAF) announced new regulations governing the eligibility of certain female athletes with differences of sexual development accompanied by elevated levels of natural testosterone. Such women with testosterone levels above a specific threshold would be banned from competing as fe...
Article
Forum papers are thought-provoking opinion pieces or essays founded in fact, sometimes containing speculation, on a civil engineering topic of general interest and relevance to the readership of the journal. The views expressed in this Forum article do not necessarily reflect the views of ASCE or the Editorial Board of the journal.
Chapter
Land-use/cover change (LULCC) plays an important role in the climate system. Climatic impacts of LULCC can be observed at all spatiotemporal scales. LULCC results in the modification of both biogeophysical and biogeochemical properties of the land and atmosphere. Examples of biogeophysical characteristics can be leaf area index (LAI), surface rough...
Article
To mitigate climate change at local, regional, and global scales, we must begin to think beyond greenhouse gases.
Article
Full-text available
Long-term surface air temperatures at 1.5 m screen level over land are used in calculating a global average surface temperature trend. This global trend is used by the IPCC and others to monitor, assess, and describe global warming or warming hiatus. Current knowledge of near-surface temperature trends with respect to height, however, is limited an...
Article
Full-text available
This article represents the second report by an ASCE Task Committee "Infrastructure Impacts of Landscape-driven Weather Change" under the ASCE Watershed Management Technical Committee and the ASCE Hydroclimate Technical Committee. Herein, the 'infrastructure impacts" are referred to as infrastructure-sensitive changes in weather and climate pattern...
Article
Full-text available
Long-term surface air temperatures at 1.5m screen level over land are used in calculating a global average surface temperature trend. This global trend is used by the IPCC and others to monitor, assess, and describe global warming or warming hiatus. Current knowledge of near-surface temperature trends with respect to height, however, is limited and...
Article
Full-text available
Long-term surface air temperatures at 1.5 m screen level over land are used in calculating a global average surface temperature trend. This global trend is used by the IPCC and others to monitor, assess, and describe global warming or warming hiatus. Current knowledge of near-surface temperature trends with respect to height, however, is limited an...
Article
Both observational and modeling studies clearly demonstrate that land-use and land-cover change (LULCC) play an important biogeophysical and biogeochemical role in the climate system from the landscape to regional and even continental scales. Without comprehensively considering these impacts, an adequate response to the threats posed by human inter...
Article
Full-text available
This article represents the first report by an ASCE Task Committee "Infrastructure Impacts of Landscape-driven Weather Change" under the ASCE Watershed Management Technical Committee and the ASCE Hydroclimate Technical Committee. In this first of a series of reports, it argues for explicitly considering the well-established feedbacks triggered by i...
Article
In recent years, claims have been made in venues including the authoritative reports of the Intergovernmental Panel on Climate Change (IPCC) and in testimony before the U.S. Congress that economic losses from weather events have been increasing beyond that which can be explained by societal change, based on loss data from the reinsurance industry a...
Article
Full-text available
This study adopted a differential land-use/land-cover (LULC) analysis to evaluate dam-triggered land–atmosphere interactions for a number of LULC scenarios. Two specific questions were addressed: (1) can dam-triggered LULC heterogeneities modify surface and energy budget, which, in turn, change regional convergence and precipitation patterns? (2) H...
Article
Understanding the impact of postdam climate feedbacks, resulting from land use/land cover (LULC) variability, on modification of extreme precipitation (EP) remains a challenge for a twenty-first-century approach to dam design and operation. In this study, the Regional Atmospheric Modeling System (RAMS, version 6.0) was used, involving a number of p...
Article
Land cover changes (LCCs) play an important role in the climate system. Research over recent decades highlights the impacts of these changes on atmospheric temperature, humidity, cloud cover, circulation, and precipitation. These impacts range from the local- and regional-scale to sub-continental and global-scale. It has been found that the impacts...
Article
A comparison between two mesoscale models, Colorado State University Regional Atmospheric Modeling System (RAMS) version 4.4 coupled with the Land-Ecosystem-Atmosphere Feedback Model (LEAF2) and Penn State/NCAR's Mesoscale Model (MM5) coupled with NOAH Land Surface Model, was conducted in order to assess the sensitivity of forecasted planetary boun...
Chapter
Moist enthalpy hereafter referred to as equivalent temperature (TE), expresses the atmospheric heat content by combining into a single variable air temperature (T) and atmospheric moisture. As a result, TE, rather than T alone, is an alternative metric for assessing atmospheric warming, which depicts heat content. Over the mid-latitudes, TE and T g...
Article
This chapter introduces the dynamics of synoptic-scale systems. These systems form the background from which mesoscale atmospheric systems develop.
Article
I served on the AGU panel to draft the updated position statement on climate change. We were charged by AGU to provide “an up-to-date statement [that] will assure that AGU members, the public, and policy makers have a more current point of reference for discussion of climate change science that is intrinsically relevant to national and internationa...
Article
study investigates the magnitude and spatial extent of extreme summer temperature and specific humidity events in the extratropical northern hemisphere (NHEXT) using the NCEP Reanalysis (1979-2012) and the 20th century reanalysis (1871-2010). Specifically, we look at the percentage of area exceeding standard deviation thresholds in layer-averaged (...
Article
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The results from phase I of the North American Regional Climate Change Assessment Program (NARCCAP) are discussed. These results will be used to establish uncertainty due to boundary conditions, along with final weighting of the models for the development of regional probabilities of climate change. Downscaling from re-analysis products (type 2 dow...
Article
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In 2011, thunderstorms in the United States resulted in 550 deaths from tornadoes and more than $28 billion in property damage, according to data from the US National Oceanic and Atmospheric Administration, with the vast majority of economic losses resulting from tornadoes. This article normalizes U.S. tornado damage from 1950 to 2011, using severa...
Book
Climate change has been the subject of thousands of books and magazines, scientific journals, and newspaper articles daily. It as a subject that can be very political and emotional, often blurring the lines between fact and fiction. The vast majority of research, studies, projections and recommendations tend to focus on the human influence on clima...
Article
The global average temperature anomalies are based in part on the Global Climate Observing Network (GCON) stations ’ data. To insure the reliability of data, the Mongolian GCON meteorological stations ’ exposure characteristics were surveyed during July-August 2005. Mongolia is a large continental region sandwiched between Russia and China at the j...
Article
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Annual precipitation on the Caribbean island of Puerto Rico has decreased steadily during the twentieth century, on average by 16%. The reduced rainfall manifested itself in the form of regular water rationings for millions of inhabitants during the 1990s. This chapter examines the link between the reduction in precipitation and the land-cover chan...
Article
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We discuss the adoption of a bottom-up, resource-based vulnerability approach in evaluating the effect of climate and other environmental and societal threats to societally critical resources. This vulnerability concept requires the determination of the major threats to local and regional water, food, energy, human health, and ecosystem function re...
Article
The Mei-yu front system occurring from 23 to 27 June 1999 consists of the Mei-yu front and the dewpoint front, which confine a warm core extending from the eastern flank of the Tibetan Plateau to the west of 145°E. To further understand the synopticscale physical mechanisms associated with the Mei-yu front system, the present study proposes another...
Article
Dam construction and its associated effects on landscape development can trigger local and regional climate responses, significantly altering the availability of water resources. This is the belief of the climate science community which has accumulated a rich body of research over the past few decades. Around the world, particularly in the underdev...
Article
Full-text available
Two specific questions are addressed in this study regarding dams (artificial reservoirs). (1) Can a dam (artificial reservoir) and the land use/land cover (LULC) changes triggered by it physically alter extreme precipitation? The term extreme precipitation (EP) is used as a way of representing the model-derived upper bound of precipitation that pe...
Article
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1] One of the most significant signals in the thermometer-observed temperature record since 1900 is the decrease in the diurnal temperature range over land, largely due to rising of the minimum temperatures. Generally, climate models have not well replicated this change in diurnal temperature range. Thus, the cause for night-time warming in the obs...
Article
A fully coupled atmospheric-biospheric regional climate model, GEMRAMS, was used to evaluate potential effects of land-use/land-cover changes (LULCC) on near-surface atmosphere over a southern South American domain at seasonal time scales. In GEMRAMS, leaf area index and canopy conductance are computed based on modelled temperature, solar radiation...
Article
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This essay explores the management and creation of ignorance via an explo-ration of the landscape of eastern Germany, which has seen profound social, political, and technological changes over the past several decades. Like in many places around the world decision makers in eastern Germany are seeking to reach a future state where seemingly conflict...
Article
Dynamical and statistical downscaling of multidecadal global climate models provides finer spatial resolution information for climate impact assessments [Wilby and Fowler, 2010]. Increasingly, some scientists are using the language of “prediction” with respect to future regional climate change and impacts [e.g., Hurrell et al., 2009; Shapiro et al....
Article
The Earth's weather and climate is strongly influenced by the properties of the underlying surface. Much of the solar energy that drives the atmosphere first interacts with the land or sea surface. Over land regions this interaction is modulated by surface characteristics such as albedo, aerodynamic roughness length, leaf area index (LAI), etc. As...
Article
Assessment of add-value of dynamical downscaling in Japan Climate change caused by human activities will continue for centuries. It will need at least several decades until mitigation will take effect. It is necessary to put adaptation together immediately. The impacts and potential applications of interest to the stakeholders are mostly at regiona...
Article
Different methods for computing the Lyapunov-exponent spectrum from a time series are reviewed. All algorithms are based on either Gram-Schmidt orthonormalization or Householder QR decomposition, and they use either the linearized map or a higher-order polynomial approximation. They also differ in implementation details. The ability to use these me...
Article
Full-text available
This article summarizes the changes in landscape structure because of human land management over the last several centuries, and using observed and modeled data, documents how these changes have altered biogeophysical and biogeochemical surface fluxes on the local, mesoscale, and regional scales. Remaining research issues are presented including wh...
Article
Full-text available
Authors of the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) received guidance on reporting understanding, certainty and/or confidence in findings using a common language, to better communicate with decision makers. However, a review of the IPCC conducted by the InterAcademy Council (2010) found that “the guidance...
Article
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Physicist and longest-serving US presidential science adviser.
Article
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IN THEIR POLICY FORUM “THE BIODIVERsity and ecosystem services science-policy interface” (4 March, p. 1139), C. Perrings et al. frame the new Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) as a body responsible primarily for assessment. They consistently base their elaboration of the work of IPBES on the experiences of pa...
Article
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1] The recently concluded Surface Stations Project surveyed 82.5% of the U.S. Historical Climatology Network (USHCN) stations and provided a classification based on exposure conditions of each surveyed station, using a rating system employed by the National Oceanic and Atmospheric Administration to develop the U.S. Climate Reference Network. The un...
Data
1] The recently concluded Surface Stations Project surveyed 82.5% of the U.S. Historical Climatology Network (USHCN) stations and provided a classification based on exposure conditions of each surveyed station, using a rating system employed by the National Oceanic and Atmospheric Administration to develop the U.S. Climate Reference Network. The un...
Article
This book documents how global surface temperature anomalies (GSTAs) and multidecadal trends are obtained. While ocean heat content change is a more robust metric with which to diagnose global warming, GSTAs have become a primary icon in the climate change debate. The book begins with a brief overview chapter of the Earth's radiative energy budget...
Article
Full-text available
This article summarizes the changes in landscape structure because of human land management over the last several centuries, and using observed and modeled data, documents how these changes have altered biogeophysical and biogeochemical surface fluxes on the local, mesoscale, and regional scales. Remaining research issues are presented including wh...
Article
Full-text available
Land clearing for agricultural purposes in southwest Australia has created a landscape where a 750 km rabbit-proof fence separates 13 million hectares of croplands from the remnant native vegetation to the east. The Bunny Fence Experiment (BuFex) was conducted in the vicinity of the intended vermin-proof boundary in December 2005 and August 2007. T...
Article
We evaluated shortgrass steppe energy budgets based on the Bowen Ratio Energy Balance method for three different grazing intensity treatments at the Central Plains Experimental Range Long-Term Ecological Research (CPER-LTER) site. We tested the correlations between aboveground biomass and surface energy fluxes for three different precipitation year...
Article
Societally and environmentally important resources can be separated into five major categories: water, food, energy, human health, and ecosystem function. These resources, however, are intimately interlinked. Water, for example, is required for each of the other four resources. Estimating availability of water resources, as well as other resources,...
Chapter
Full-text available
Ecological changes observed in cloud forests in the Monteverde area, northern Costa Rica, including disappearance of anuran populations and expansion of bird and bat ranges to higher elevations, have been linked to an increasing trend in dry-season mist-free days. Prior studies suggest that this trend may be influenced by both large-scale processes...