Category: Mark Friedl
To read the articles, click on the respective links above.
The article, “Direct human influence on atmospheric CO2 seasonality from increased cropland productivity,” is first authored by Gray and discusses Gray’s and Friedl’s research on how crop production influences the carbon cycle.
The article has also been featured in multiple news articles published recently.
A summary of the research can be found on Nature News and Views, and direct quotes from Friedl and Gray on their research can be found on Science 2.0, Nature World News, and The Christian Science Monitor.
To see more research done by Friedl, check out a list of his recent publications.
Assistant Professor Lucy Hutyra‘s new grant has been awarded funding from the National Oceanic and Atmospheric Administration (NOAA)‘s Atmospheric Chemistry, Carbon Cycle, and Climate Program (AC4).
Hurtyra is Principle Investigator (PI) on the grant, titled “Quantifying Carbon Signatures Across Urban-to-Rural Gradients: Advancing the Capacity for Monitoring, Reporting, and Verification Through Observations, Models, and Remote Sensing,” which has been awarded for the period of August 2014 to July 2017.
You can review all of Hutyra’s active grants by visiting the grant section of our website.
Earth & Environment Ph.D. Candidate Eli Melaas will be defending his doctoral dissertation this Thursday, June 5th, 2014, at 2:00 pm in CAS 132.
Eli’s dissertation is titled “Using Eddy Covariance, Remote Sensing and In situ Observations to Improve Models of Springtime Phenology in Temperate Deciduous Forests.”
Eli is a Ph.D. Candidate in Geography and Environment. His primary advisor is Professor Mark Friedl and his research interested include remote sensing and modeling of phenology.
Eli’s dissertation defense will be open to the public; please come out and support Eli!
The Department of Earth & Environment Graduate Student Seminar Series will feature talks this week by graduate students Conor Gately and Mary Farina.
This week’s seminar will be held at 3:30 pm this Friday, May 2nd, in STO 453.
Refreshments will be served following the talks.
Mary Farina is receiving her Masters in Geography this year and is an advisee of Professor Mark Friedl.
Abstracts of the talks:
“CO2, Cars and Cities: Does Driving Diminish with Density?” by Conor Gately
The talk will present recent results from the development of a new, multi-decadal, high-resolution inventory of U.S. on-road CO2 emissions. Analysis of emissions trends in urban and rural areas reveals a complex relationship between road travel, CO2 emissions, and population density. These results have implications for urban growth scenarios, as well as for policies to mitigate vehicle emissions and reduce traffic congestion in major urban areas.
“Relationships between tree rings and satellite-based canopy greenness in mixed temperate forests” by Mary Farina
This project examines links between ground-based and satellite-based measures of tree growth in the Northeast United States. Correlations between tree ring widths, Landsat vegetation indices, and Landsat-based phenology records are investigated.
Earth & Environment graduate student Jon Wang was recently awarded a National Science Foundation (NSF) Graduate Research Fellowship Award.
Wang’s research will focus on the remote sensing of urban heat islands and the climate-mediated effects of urbanization on phenology in New England.
Wang is advised by Professor Mark Friedl. Wang’s graduate studies focus on the topics of remote sensing and urban ecology.
Department of Earth and Environment Professor Mark Friedl was recently awarded funding from NASA for his new project, “Using Three Decades of Landsat Data to Characterize Changes and Vulnerability of Temperature and Boreal Forest Phenology to Climate Change.”
Friedl and his team will use Landsat data collected over the past 30 years to analyze the growing season of temperate and boreal forests in North America. Their goal is to use the data to better understand how these forests have responded to climate change. Working with Friedl as Co-investigators on the project will be Department of Earth and Environment Professor and Chair Curtis Woodcock and current Ph.D. student Eli Melaas.
The project will begin this spring and take place over the next three years.
A detailed abstract of the project is as follows:
“Climate change is creating well-documented impacts on terrestrial ecosystems. Among the best known of these impacts are changes to the growing season of temperate and boreal forests. Changes in phenology provide useful diagnostics of climate change impacts in these biomes, influence coupled biosphere-atmosphere interactions, and also affect regional-to-global carbon budgets. Extreme events and climate variability complicate the response of ecosystems and increase vulnerability by inducing large phenological responses that affect ecosystem function at seasonal (and longer) time scales. Studies using in-situ measurements have suggested that the growing season of temperate and boreal ecosystems is changing, and remote sensing-based research using time series imagery from coarse resolution sensors appear to confirm this trend. Specifically, studies using AVHRR NDVI data have documented changes in growing season NDVI that indicate widespread perturbations to boreal and temperate forests in response to climate change. However, the coarse spatial resolution and other limitations of AVHRR data constrain the types of inferences that can be drawn from these data. Sub-pixel contamination of AVHRR time series by snow and disturbance events introduce sources of variation unrelated to phenology, and challenges associated with instrument calibration, atmospheric correction, and geo-location uncertainty further reduce the utility of these data for long-term phenology studies. In this proposal we describe research to address these challenges using Landsat data. Specifically, we propose to use a new methodology that exploits dense time series of Landsat images to quantify spatio-temporal patterns in North American temperate and boreal forest growing season dynamics. Our proposed methodology uses a sampling strategy designed to capture geographic variation in temperate and boreal forest properties, and focuses on regions of overlap between adjacent Landsat scenes, thereby significantly increasing the temporal sampling of Landsat images. Because temperate and boreal ecosystems are characterized by frequent disturbance and have snow on the ground at times of the year that are especially important for detecting changes in phenology, our methodology will exploit datasets related to fire disturbance such as the Canadian and Alaskan Large Fire databases, and will include strategies to screen and remove snow-contaminated pixels. Results from this research will yield methods and datasets for retrospective characterization of changes to temperate and boreal forest growing seasons spanning 30+ years at 30-meter spatial resolution. In doing so, this research will (1) dramatically improve information about how temperate and boreal forests have changed in response to climate change, and (2) improve understanding regarding the sensitivity and vulnerability of these forests to climate change.”
Below is a list of scheduled talks being held on Friday December 13th 2013 by Department of Earth and Environment Faculty, Researchers, and students at the AGU Fall Meeting.
8:00 am to 10:00 am
at 3008 (Moscone West)
A51I. A51I. Measurements, Modeling, and Evaluation of Emissions VII
- Conor Gately; Lucy Hutyra; Ian Sue Wing. A new gridded on-road CO2 emissions inventory for the United States, 1980-2011. A51I-06. (9:35 – 10:00)
at 3003 (Moscone West)
- Lucy Hutyra; Steve M. Raciti; Allison L. Dunn; Conor Gately; Ian Sue Wing; Curtis Woodcock; Pontus Olofsson; Mark A. Friedl. Impacts of urbanization on the carbon cycle (Invited). GC51E-02. (8:20 – 8:40)
8:00 am to 12:20 pm
at Hall A-C (Moscone South)
B51C. B51C. Ecosystem Structure: Remote Sensing Observations and Modelling of Its Influence on Radiation Regimes and Gas Exchanges II Posters
- Bin Yang; Yuri Knyazikhin; Lei Yan; Yunsheng Zhao; Jiannan Jiao. IMPACT OF FOLIAGE SURFACE PROPERTIES ON VEGETATION REFLECTION AND ABSORPTION. B51C-0285.
- Zhan Li; Alan H. Strahler, Crystal Schaff, et al. Separating Leaves from Trunks and Branches with Dual-Wavelength Terrestrial Lidar Scanning: Improving Canopy Structure Characterization in 3-D Space. B51C-0289.
- Alan H. Strahler; Xiaoyuan Yang; Zhan Li; Crystal Schaaf; et al. Retrieving Leaf Area Index and Foliage Profiles Through Voxelized 3-D Forest Reconstruction Using Terrestrial Full-Waveform and Dual-Wavelength Echidna® Lidars. B51C-0290.
B51G. B51G. Phenology as Both Forcing and Response: Integrating Measurements and Models Across Terrestrial and Aquatic Ecosystems I Posters [SWIRL_CM]
- Toni Viskari; Michael Dietze; Ankur R. Desai. Model-data assimilation of multiple phenological observations to constrain and forecast leaf area. B51G-0381.
S51A. S51A. Seismology Contributions: Signal Processing, Networks and Instrumentation II Posters
- Bruce C. Beaudoin; Kasey Aderhold; Katyliz Anderson; Mary Pfeifer; Tim Parker; Pnina E. Miller; George W. Slad; Angela Reusch. Direct burial and vault emplacement data quality comparison at Dotson Ranch, New Mexico. S51A-2329.
S51C. S51C. Oceanic Strike-Slip Faulting: Transforms to Intraplate I Posters
- Kasey Aderhold; Rachel E. Abercrombie; Michael S. Antolik. Seismic slip of oceanic strike-slip earthquakes. S51C-2388.
V51B. V51B. Garnet: Common Mineral, Uncommonly Useful I Posters (cosponsored by MSA)
- Nora Sullivan; Claire Ostwald; Xu Chu; Ethan F. Baxter; Jay J. Ague; James O. Eckert. High temperature garnet growth in New England: regional temperature-time trends revealed. V51B-2654.
- Kathryn A. Eccles; Ethan F. Baxter; Stephen J. Mojzsis; Horst Marschall; Michael L. Williams; Michael J. Jercinovic. Neoarchean metamorphism recorded in high-precision Sm-Nd isotope systematics of garnets from the Jack Hills (Western Australia). V51B-2655.
10:20 am – 12:20 pm
at 2006 (Moscone West)
B52C. B52C. New Mechanisms, Feedbacks, and Approaches for Improving Predictions of the Global Carbon Cycle in Earth System Models II [SWIRL_CU]
- Adrien Finzi; Allison L. Gill (BIOLOGY). The carbon cost of nutrient uptake: global patterns and use in regional to global scale models of terrestrial productivity. B52C-01. (10:20 – 10:35)
1:40 pm – 3:40 pm
at 2004 (Moscone West)
B53G. B53G. Remote Sensing of Vegetation for Monitoring Ecosystem Functioning III
- Mark A. Friedl; Joshua P. Gray; Eli K. Melaas; Andrew D. Richardson; Amey Bailey; John O’Keefe. Using Time Series of Landsat, MODIS, and Ground Measurements to Characterize and Quantify the Sensitivity of Temperate Forest Phenology to Climate Change (Invited). B53G-01. (1:40 – 1:55)
at 301 (Moscone South)
V53D. V53D. Garnet: Common Mineral, Uncommonly Useful II (cosponsored by MSA)
- Ethan F. Baxter; Erik E. Scherer. The success and complementarity of Sm-Nd and Lu-Hf garnet geochronology. V53D-08. (3:25-3:40)
Mark Friedl will be giving a talk tomorrow, Wednesday Oct 23, 2013, at 3:30 pm in STO 442. His lecture will last one hour and will focus on the topic of phenology. His lecture is part of the continuing Terrestrial Biogeoscience Seminar Series. Check out the upcoming Terrestrial Biogeoscience Seminar schedule via Earth and Environment’s calendar or the Terrestrial Biogeoscience website.