Field Work

GeoSciences Column: Forests in flux – log-jams in the Amazon

Robert Emberson October 25, 2017

The impact of log jams on river geomorphology is varied. Unravelling the untouched . Credit: Amajida Roslim (distributed via imaggeo.egu.eu).

Collapsing dams are a staple of disaster films, but the form that these take in natural systems is also surprisingly varied. Streams and rivers can be blocked by a range of rapid and gradual inputs. One of the lesser-known causes of stream blockage is through the accumulation of large woody debris – tree trunks and large branches – to form a log jam. The impact of these jams on river geomorphology ...[Read More]

Imaggeo on Mondays: One of the oldest evergreen rainforests in the world

Frederik Tack October 16, 2017

Ratchaprapha lake in Khao Sok national park . Credit: Frederik Tack (distributed via imaggeo.egu.eu).

A blazing sky and shimmers cast by water ripples frame the spectacular beauty of one of the world’s oldest treasures: an evergreen rainforest in Thailand. Today’s featured image was captured by Frederik Tack, of the Institute for Space Aeronomy in Brussels. This picture was taken during sunset between the limestone mountains with the sunlight reflecting on beautiful Ratchaprapha lake i ...[Read More]

Malawi High School Teacher’s Workshop on Natural Hazards

Faith Taylor and Bruce Malamud October 5, 2017

Some typical scenes from Malawi (Left) sunrise on Lake Malawi, (Right) Women carrying thatch. Photos: B. Malamud

In July 2017, Professor Bruce Malamud and Dr Faith Taylor from King’s College London travelled to Mzuzu, Malawi to work in collaboration with Mr James Kushe from Mzuzu University, Malawi. They delivered an EGU funded workshop at Mzuzu University to high school teachers on natural hazards, with major funding provided by EGU, and also supported by Urban ARK and Mzuzu University. Faith and Bruce expl ...[Read More]

GeoTalk: The anomaly in the Earth’s magnetic field which has geophysicists abuzz

Laura Roberts-Artal September 21, 2017

The South Atlantic Anomaly (SAA, the large red area in the image) is a dip in the Earth's magnetic field which allows cosmic rays, and charged particles to reach lower into the atmosphere. This interferes with communication with satellites, aircraft, and the Space Shuttle. While there are theories as to why this occurs, the geologic origin is not yet known. The data were collected by the South Atlantic Anomaly Detector (SAAD) aboard ROSAT. It consists of 10 cm² of Germanium and served as a particle background monitor. The SAAD was used to "safe" the PSPC if rates became too high. Source: ROSAT SAA Guest Observer Facility (NASA Goddard Space Flight Centre) . Credit: S. L. Snowden

Geotalk is a regular feature highlighting early career researchers and their work. In this interview we speak to Jay Shah, a PhD student at Imperial College London, who is investigating the South Atlantic Anomaly, a patch over the South Atlantic where the Earth’s magnetic field is weaker than elsewhere on the globe. He presented some of his recent findings at the 2017 General Assembly. First, coul ...[Read More]