Land Change Science Program


Filter Total Items: 32
USGS scientist samples an ocean sediment core
June 19, 2019

Sediment Cores Reveal the History of the Pacific Ocean

USGS scientist Summer Praetorius collects samples from an ocean sediment core in the Pacific Ocean Paleoclimatology Lab at Menlo Park, CA. The sediment core is from Tanner Basin, located about 200 miles due west of San Diego in the eastern Pacific Ocean. This area is the southern-most extension of the California Current upwelling system, which brings cold nutrient-rich

Six grains of fossilized pollen viewed under a microscope.
June 13, 2019

Secrets of the Past Unlocked by Fossil Pollen

Did you know fossil pollen and spores can help us understand past climate variability?

You are looking at microscopic images of ~55-million-year old pollen grains and spores that were isolated from a geologic unit known as the Marlboro Clay in Maryland. The presence of plant groups now found in tropical, subtropical, and temperate areas indicate that climates were

Map of AK showing probability of change occurrence
December 31, 2018

Map of AK showing probability of change occurrence

Map of Alaska showing probability (%) of change occurrence. Insets show fire boundaries from the Bureau of Land Management (BLM) Large Fire Database and Landsat 8 imagery (bottom right; 2016) north of Fairbanks, Alaska.

Satellite image showing FPI.
October 10, 2018

FPI Forecast

Fire Potential Index map for October 10, 2018.

Satellite data image for expected fires.
August 30, 2018

USGS Fire Danger Forecast Large Fire Probability

Large Fire Probability for August 30, 2018.  Percent change estimate, given a source for ignition that a fire will grow to 100+ acres.

Image showing expected number of large fires.
August 30, 2018

Fire Danger Expected Number of Fires per PSA

This map takes into account both probability of ignition and conditional probability of spread (to 500+ acres in East and 1000+ acres in West*) given ignition.

Image showing fire potential.
August 30, 2018

Fire Potential Index (FPI) forecast

The FPI is most similar to the Energy Release Component of the National Fire Danger Rating System in that both are moisture related indexes and neither indicates the effect of wind on fire potential. 

Image showing probability of large fire.
August 30, 2018

Large Fire Probability

This map takes into account both probability of ignition and conditional probability of spread (to 500+ acres in East and 1000+ acres in West*) given ignition.

Graph image for fires in upcoming week.
August 29, 2018

Historic Distribution of 100+ acres Fires per Forthcoming Week

Summary of Fires by GACC Units: For the week of 08/29/2018

October 10, 2017

Global Mountain Explorer Video Tutorial

This video contains a narrated introduction to the Global Mountain Explorer, or GME. The GME is a web-based tool for visualizing and exploring three well known global mountain datalayers. The video tutorial provides background information on the three global mountain characterizations, and provides users with a walk through of all the functionality of the map exploration

Researcher samples sediments on exposed cliff face.
July 27, 2016

Socastee Formation Sampling to Study Past Records of Sea Level

In July of 2016, a team from the Climate and Land Use Research and Development Program took a trip to South Carolina to study outcrops of the “Canepatch” and “Socastee” formations along the Intra-Coastal Waterway, near Myrtle Beach. The age of these fossiliferous marine units has been controversial for several decades. To re-assess the ages of these formations, fossil

Scientist laying cable in a field
June 1, 2016

Laying Ground Cable to Measure Permafrost

USGS scientist Burke Minsley and project partners from the U. Alaska Fairbanks lay ground cable to measure permafrost depth at Nome Creek site north of Fairbanks, Alaska.