Search Results for “ge r”

DECADAL TRENDS IN THE SEASONAL-CYCLE AMPLITUDE OF TERRESTRIAL CO2 EXCHANGE RESULTING FROM THE ENSEMBLE OF TERRESTRIAL BIOSPHERE MODELS

The seasonal-cycle amplitude (SCA) of the atmosphere–ecosystem carbon dioxide (CO2) exchange rate is a useful metric of the responsiveness of the terrestrial biosphere to environmental variations. It is unclear, however, what underlying mechanisms are responsible for the observed increasing trend of SCA in atmospheric CO2 concentration. Using output data from […]

By Ecoss, 7 yearsJanuary 9, 2017 ago

Long-term drainage reduces CO2 uptake and increases CO2 emission on a Siberian floodplain due to shifts in vegetation community and soil thermal characteristics

With increasing air temperatures and changing precipitation patterns forecast for the Arctic over the coming decades, the thawing of ice-rich permafrost is expected to increasingly alter hydrological conditions by creating mosaics of wetter and drier areas. The objective of this study is to investigate how 10 years of lowered water […]

By Ecoss, 8 yearsAugust 3, 2016 ago

AGU Bridge Program at NAU

The American Geophysical Union (AGU) has partnered with NAU to implement its Bridge Program. The goal is to increase the number of students from underrepresented racial and ethnic groups obtaining graduate degrees in the geosciences. As partners with AGU’s bridge program, NAU faculty help to fulfill this goal by demonstrating […]

By Jack Torresdal, 2 monthsFebruary 22, 2024 ago

A CIRCUIT SHOWS HOW CLIMATE WARMING MAY ALTER DIFFERENT ECOLOGICAL LEGACIES IN THE ARCTIC BOREAL FOREST, WHICH THEN FEEDBACK INTO CLIMATE WARMING AND CHANGES TO LANDSCAPE PROCESSES.

NAU-led research team receives $9.6M to study how Alaska’s forests change, adapt to warmer future

Ecological memory stored in a landscape can help an ecosystem recover from disturbances like fire and outbreaks of disease. But what happens when climate warming disrupts that process? How long before ecological memories stored in the warming Arctic are overwritten by new ones, and what does that mean for the […]

By Brian Marbury, 12 monthsApril 25, 2023 ago

image depicts an earth sliced into nine segments, each representing possible emissions scenarios from permafrost through the year 2100

Future emissions from ‘country of permafrost’ significant, must be factored into global climate targets

By the end of this century, permafrost in the rapidly warming Arctic will likely emit as much carbon dioxide and methane into the atmosphere as a large industrial nation, and potentially more than the U.S. has emitted since the start of the industrial revolution. But that’s only one possible future […]

By Brian Marbury, 2 yearsOctober 17, 2022 ago

A bridge to stronger, more diverse Earth sciences

The Center for Ecosystem Science and Society (Ecoss) at NAU has been named one of 15 new partner institutions of the AGU Bridge Program, which works to support students in applying to and succeeding in graduate school in the Earth sciences. Ecoss and the other new partner groups join a […]

By Stephanie Mayer, 2 yearsApril 29, 2022 ago

Relevant, dead, or both?: Team wins $15M from Department of Energy to study how microbes’ traits are linked to carbon storage

Do dead microbes control the future of Earth’s climate? A team of researchers led by Lawrence Livermore National Laboratory (LLNL) suspects they might. Using new tools, the team can see which soil organisms are thriving and which are dying in California’s changing climate—and what happens to carbon in their cell […]

By Brian Marbury, 3 yearsOctober 1, 2021 ago

Effects of human disturbance activities and environmental change factors on terrestrial nitrogen fixation

Biological nitrogen (N) fixation plays an important role in terrestrial N cycling and represents a key driver of terrestrial net primary productivity (NPP). Despite the importance of N fixation in terrestrial ecosystems, our knowledge regarding the controls on terrestrial N fixation remains poor. Here, we conducted a meta-analysis (based on […]

By Stephanie Mayer, 3 years ago

New soil carbon sequestration with nitrogen enrichment: a meta-analysis

Through agriculture and industry, humans are increasing the deposition and availability of nitrogen (N) in ecosystems worldwide. Carbon (C) isotope tracers provide useful insights into soil C dynamics, as they allow to study soil C pools of different ages. We evaluated to what extent N enrichment affects soil C dynamics […]

By Stephanie Mayer, 3 years ago

A spatial concordance correlation coefficient with an application to image analysis

In this work we define a spatial concordance coefficient for second-order stationary processes. This problem has been widely addressed in a non-spatial context, but here we consider a coefficient that for a fixed spatial lag allows one to compare two spatial sequences along a 45°line. The proposed coefficient was explored […]

By Ecoss, 3 years ago

Search Results for: ge r