Snow algae drive productivity and weathering at volcanic rock-hosted glaciers

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Primary productivity of snow algae communities on stratovolcanoes of the Pacific Northwest

The majority of geomicrobiological research conducted on glacial systems to date has focused on glaciers that override primarily carbonate or granitic bedrock types, with little known of the processes that support microbial life in glacial systems overriding volcanic terrains (e.g., basalt or andesite). To better constrain the role of the supraglacial ecosystems in the carbon and nitrogen cycle...

متن کامل

Iron oxides and hydroxides in the weathering interface between Stereocaulon vesuvianum and volcanic rock

The effectiveness of lichens in degrading their rock substrates, leading to the first stages in the formation of soil, has long been discussed and opinions have varied widely (Jones, 1988; Syers & lskandar, 1973). Nevertheless, it is generally recognized that lichen encrusted rocks provide an ideal environment for studying the biological weathering of minerals since, unlike the situation in soi...

متن کامل

Manipulation, Uses and Benefits of Glaciers, Ice and Snow

Keywords: Artificial intensification of melting; blackening of snow and ice; constructions from snow and ice; engineering-glaciology problems; freezing of water onto ice; utilization of icebergs Contents 1. Introduction 2. Engineering-glaciology problems 2.1. Mechanical principle of the effect 2.2. Thermal physical principle of the effects 3. Artificial intensification of melting of mountain gl...

متن کامل

Distributed Mapping of Snow and Glaciers for Improved Runoff Modelling

Runoff in glacierized alpine basins results from the seasonal snow cover and from the glacier melt. Due to high resolution satellite sensors, it is possible to map snow cover and glacier areas in the basin of Massa-Blatten, 196 km2, 1447 4191 m a.s.l. Depletion curves of snow covered areas were derived in six elevation zones. In addition, the date was determined when the glacierice became expos...

متن کامل

Evolution of rock glaciers and alpine glaciers: A model–model approach

The effects of horizontal stress transmission on the transient evolution of non-linear viscous bodies having aspects ratios similar to active alpine rock glaciers is investigated. This is done through a comparison between a shallow-ice model, which predicts material flux to be a local function of thickness and slope, and a finite-element model, which solves the full Stokes problem. For length-t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Geochimica et Cosmochimica Acta

سال: 2019

ISSN: 0016-7037

DOI: 10.1016/j.gca.2018.12.024