AGU Abstracts Due Tuesday Aug 6th!

Abstracts for presentations at the 2013 American Geophysical Union annual meeting are due this Tuesday, August 6th by 23:59ET/3:59+1 GMT. The meeting will be held December 9-13, 2013 in San Francisco, California

Abstracts can be submitted here.

There are many AGU sessions to which Novus participants may wish to submit abstracts:

PP012. Linking palaeoclimatic information from natural archives and instrumental data: Forcing factors on climatic variability
Instrumental data are of great interest since they provide direct observation of climate evolution. Yet, climate archives allow deciphering past climate changes on larger temporal scales.This session will host contributions on the identification of forcing factors on climate recorded in natural archives (marine/lake sediments, ice cores, speleothems, tree rings) and instrumental observations, from the last century to the last interglacial. New statistical methodologies and applied quantitative studies devoted to calibrating archive-derived signals using of instrumental data are encouraged, in order to extend further back in time the understanding of climate variability.

B022. Dynamics of Global Forests under a Changing Climate
Forests are an influential component of the global carbon cycle and play an important role in Earth’s climate system. Climate change is altering forest dynamics, driving biogeochemical and biophysical feedbacks to the climate system. This session will focus on impacts of climate change on forests globally and consequent climate feedbacks. In particular, it will address both the mechanisms through which altered atmospheric CO2 and climate are likely to impact forest dynamics—including physiological responses, community dynamics, and biogeochemical cycling—and the implications of forest-climate feedbacks that could buffer or accelerate change.

B025. Ecological Disturbance: observing and predicting the impacts of landscape disturbance
Ecological disturbance is a fundamental driver of terrestrial carbon cycle dynamics. Drought, rising temperatures and historical land use have promoted widespread forest die-off, insect infestations and catastrophic wildfire. With the potential for more frequent disturbances or more widespread disturbances in the future, observational, experimental and modeling studies are needed to understand future changes in the carbon cycle. This session focuses on observational and modeling studies into the effects of ecological disturbance on terrestrial ecosystem carbon balance and ways to understand non-equilibrium conditions.

H043. Hydrological and Biogeochemical Recovery in Forests After Disturbance
While the hydrological and biogeochemical response of forested catchments to disturbance is well-documented, the general patterns and driving mechanisms for recovery time remains under-studied. Predicting the resilience of forested catchments to all types of disturbance is fundamental to efficient forest management. Thus, this session will explore our current understanding of forested catchment recovery after disturbance. Topics of interest include methods for quantifying recovery, field and modeling studies of recovery mechanisms, and cross-site comparisons. The session will be a forum to share new insight into the recovery of forest hydrological and biogeochemical function after disturbance.

GC046. Altered Nutrient Cycling in High-Latitude Systems
Despite strong nutrient limitation at high-latitudes, less attention is paid to climate change impacts on nutrient cycling than to direct effects on carbon cycling. In addition to a potential source of nutrients with permafrost thaw, climate change may alter disturbance regimes (i.e., fire), hydrology (i.e.. water tables) and vegetation communities (i.e., shrub expansion). These factors influence nutrient inputs, cycling and transport. In this session, we propose to explore how changing climate alters nutrient dynamics in permafrost-dominated ecosystems. We welcome presentations on the cycling of N, P and other nutrients, especially those on disturbance effects, terrestrial-aquatic linkages and growing season controls on productivity.

B050. New Mechanisms, Feedbacks, and Approaches for Improving Predictions of the Global Carbon Cycle in Earth System Models
Predictions of future atmospheric CO2 concentrations are influenced by global carbon and nutrient cycles, climate interactions, and feedbacks. Relevant processes operate at different spatial and temporal scales, vary across marine and terrestrial ecosystems and remain uncertain. Moreover, feedbacks may be altered by anthropogenic disturbance agents, including tropospheric O3, acceleration of the N and H2O cycles, eutrophication, and land cover/use changes. This session focuses on integrated understanding of feedback mechanisms, structure and function of critical and vulnerable ecosystems, human activities, and approaches for evaluating and benchmarking Earth System Models.

GC051. Thresholds in Soil Response to Global Change
Global change impacts and response are mediated strongly by soils, the core component of the Earth’s critical zone. The capacity of the soil system to withstand global-scale perturbations (e.g., climate or land use change, spread of invasive species) may depend on non-linear thresholds in soil state and function as these forcing factors increase in extent and severity. This session explores thresholds of change in soil state and function to better understand vulnerability to global change. Studies that focus on non-linear shifts carbon storage and release in soil, novel isotopic fractionation, changes in soil-water interactions to better understand non-linear thresholds in soil condition, water transport and chemistry are encouraged.

B068. The Bio-Atmospheric N Cycle: N emissions, transformations, deposition, and terrestrial and aquatic ecosystem impacts
Biogenic and anthropogenic emissions of reactive nitrogen (Nr) are transported, chemically transformed, and deposited on land and waters, altering structure and function of ecosystems and degrading environmental quality. Estimating atmospheric N emissions and deposition, and evaluating ecosystem responses require a diverse array of measurements and models that link processes at multiple scales. We seek presentations on physical, chemical, biological, and anthropogenic processes that drive local, regional and global nitrogen exchange, impacts on ecosystems, carbon uptake, nitrogen export, biodiversity, human health, and policy implications and responses.

B072. Vulnerability, Disturbance Impacts, and Responses
Studies to assess vulnerability (metrics and indicators) under climate change have become widespread in recent years. Vulnerable systems are more susceptible to disturbances that in turn alter biophysical, ecohydrological, biogeochemical, and societal processes. Under climate change these disturbances are occurring in new ecosystems and in others are projected to increase in frequency, intensity, and spatial extent. This session solicits abstracts encompassing a range of disturbances, including fire, herbivory, biomass removals, land conversion, extreme weather, and invasive species. We seek studies developing vulnerability metrics and indicators; evaluating extent, intensity, and impact of disturbances; and recovery following the events.

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