A5066147579- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Polar Research and Ecology
- Climate change and permafrost
- Winter Sports Injuries and Performance
- Landslides and related hazards
- earthquake and tectonic studies
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Microbial Community Ecology and Physiology
- Arctic and Antarctic ice dynamics
- Isotope Analysis in Ecology
- Evolution and Paleontology Studies
- Geological and Geochemical Analysis
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Karst Systems and Hydrogeology
- Pacific and Southeast Asian Studies
- Climate variability and models
- Seismology and Earthquake Studies
- Archaeology and ancient environmental studies
- Environmental DNA in Biodiversity Studies
- Satellite Image Processing and Photogrammetry
- Geological and Geophysical Studies
- Hydrology and Watershed Management Studies
University of Otago
2015-2024
Australian Defence Force Academy
1989-1991
UNSW Sydney
1990-1991
University of Tasmania
1989-1990
University of Newcastle Australia
1989
University of Canterbury
1985
Abstract The sensitivity of glaciers to climatic change is key information in assessing the response and sea-level implications projected future warming. New Zealand are important globally as an example how maritime will contribute rise. A spatially distributed energy-balance model applied Brewster Glacier, Zealand, order calculate glacier mass balance, run-off climate change. successfully simulates four annual mass-balance cycles. Close half (52%) energy available for melt on supplied by...
Research Article| December 01, 2012 Lake sediments record cycles of sediment flux driven by large earthquakes on the Alpine fault, New Zealand Jamie D. Howarth; Howarth 1Department Geography, University Otago, PO Box 56, Dunedin, Search for other works this author on: GSW Google Scholar Sean J. Fitzsimons; Fitzsimons Richard Norris; Norris 2Department Geology, Geraldine E. Jacobsen 3Institute Environmental Research, Australian Nuclear Science and Technology Organization, Locked Bag 2001,...
Abstract Aquatic dissolved organic matter (DOM) is a major reservoir of reduced carbon and has significant influence on heterotrophic biological productivity water quality in marine freshwater environments. Although the forms transformations DOM temperate aquatic soil environments have been studied extensively, this not case for glacial In study, fluorescent excitation–emission matrices (EEMs), parallel factor analysis (PARAFAC) cluster were used to characterize fluorescing components ice...
Research Article| March 01, 2016 A 2000 yr rupture history for the Alpine fault derived from Lake Ellery, South Island, New Zealand Jamie D. Howarth; Howarth † 1GNS Science, P.O. Box 30-368, Lower Hutt, Zealand2Department of Geography, University Otago, 56, Dunedin, †j.howarth@gns.cri.nz Search other works by this author on: GSW Google Scholar Sean J. Fitzsimons; Fitzsimons 2Department Richard Norris; Norris 3Department Geology, Robert Langridge; Langridge Marcus Vandergoes Author and...
Paleoseismology has been making an important contribution to understanding the Alpine Fault and hazard it poses society. However, evidence of past earthquakes comes from a wide variety sources publication somewhat fragmented. Here, we review physical for large great on summarise current understanding, illustrate progress highlight future directions. Paleoseismic derived tree disturbance, landscape features trenches across fault. These records have supplemented extended back in time with...
Glaciers and ice sheets are the second largest freshwater reservoir in global hydrologic cycle, onset of climate warming has necessitated an assessment their contributions to sea-level rise potential release nutrients nearby aquatic environments. In particular, dissolved organic matter (DOM) from glacier melt could stimulate microbial activity both glacial ecosystems adjacent watersheds, but this would largely depend on composition material released. Using fluorescence (1)H NMR spectroscopy,...
Abstract. A new and consistent time series of glacier retreat on Kilimanjaro over the last century has been established by re-interpreting two historical maps processing nine satellite images, which removes uncertainty about location extent past present ice bodies. Three-dimensional visualization techniques were used in conjunction with aerial ground-based photography to facilitate interpretation boundaries eight epochs between 1912 2011. The glaciers have retreated from their former 11.40...
Two ∼4 m vertical sequences of basal ice were collected from tunnels dug into the northern lateral margin Taylor Glacier, McMurdo Dry Valleys, Antarctica. In both cases exhibit two contrasting facies groups; clean (debris-free) and banded dispersed (debris-rich). Debris-rich ices elevated CO2 depleted O2 concentrations compared to facies. Bacterial cell numbers, respiration rates, nutrient are highest in debris-rich layers. Together, our geochemical biological data indicate that microbial...
Solicited diaries/journals are increasingly popular as an innovative qualitative method in the social sciences for better understanding people’s everyday lived experiences. In this article we create a framework maintaining rigour while using such diaries. First, systematically evaluate 43 research papers focusing on method, drawing Baxter and Eyles’ (1997) seminal evaluation of human geography research. We ascertain that significant improvements could be made to procedures obtaining...
Large earthquakes shape mountain landscapes at high elevations.
The biogeochemical cycling of organic carbon (OC) has important implications for aquatic system ecology because the abundance and molecular characteristics OC influence contaminant transport bioavailability, determine its suitability as a substrate microbial metabolism. There have been few studies in glacier systems questions remain regarding abundance, provenance, transformations these environments. To address questions, fluorescence dissolved (DOC) were investigated at John Evans Glacier...
Cryoconite holes have been discussed in the literature since Nordenskiöld's 1870 crossing of Greenland. They are found high latitude and alpine glaciers where sediment is transported onto glacier surface, causing differential ablation. While studied periodically 1870, last decade there has a resurgence interest understanding hydrology, biogeochemistry ecology cryoconite holes, so it timely to take stock current state understanding, compile roadmap for future endeavours. This paper combines...
Dissolved organic matter (DOM) is ubiquitous in aquatic ecosystems and derived from various inputs that control its turnover. Glaciers ice sheets are the second largest water reservoir global hydrologic cycle, but little known about glacial DOM composition or contributions to biogeochemical cycling. Here we employ SPR-W5-WATERGATE (1)H NMR spectroscopy elucidate quantify chemical structures of constituents Antarctic as they exist their natural state (average DOC 8 mg/L) without isolation...
Cold-based polar glacier watersheds contain well-defined supraglacial, ice-marginal, and proglacial elements that differ in their degree of hydrologic connectivity, sources water (e.g., snow, ice, and/or sediment pore water), meltwater residence times, allochthonous autochthonous nutrient, loads. We investigated 11 distinct hydrological units along the ice marginal, flow paths drain Joyce Glacier McMurdo Dry Valleys Antarctica. found these play unique important roles as sinks for dissolved...
ABSTRACT Recognising the scarcity of glacier mass-balance data in Southern Hemisphere, a measurement programme was started at Brewster Glacier Alps New Zealand 2004. Evolution regime over 11 years recorded means there are differences spatial density obtained. To ensure temporal integrity dataset new geostatistical approach is developed to calculate mass balance. Spatial co-variance between elevation and snow depth allows digital model be used co-kriging develop index ( SDI ). By capturing...
Mass movements on slopes adjacent to and beneath lakes fjords can produce destructive tsunami. Reconstructing past events is crucial for understanding the extent frequency of this hazard. Current reconstruction approaches involve identifying large landslide deposits preserved lakebed analysing dimensions dynamics estimate tsunami magnitude. However, in active tectonic settings, much morphological evidence eroded or buried over time, which impedes development long event records that are...