Florian Hofhansl

Tropical Ecosystem Research

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Launch of the Ariane 5 rocket

During the extremely informative and successful CEBA thematic school in Kourou, French Guiana CNES has launched an Ariane 5 rocket on Flight VA239 being the ninth launch in 2017. Conducted from the Spaceport’s ELA-3 launch zone the successful mission delivered an estimated payload lift performance of 10,838 kg to geostationary transfer orbit (GTO).

The mission carried Intelsat 37e for global operator Intelsat; along with BSAT-4a, which was launched as part of a turnkey contract between Japan’s Broadcasting Satellite System Corporation (B-SAT) and U.S.-based satellite manufacturer SSL. Intelsat 37e was deployed first in the flight sequence, separating from Ariane 5 at 29 minutes after liftoff, followed approximately 18 minutes later by BSAT-4a.

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My colleague Bea Maas kindly presented this year’s contribution “Landscape-scale controls on aboveground forest carbon stocks along environmental gradients on the Osa peninsula, Costa Rica”

Albeit the fact that tropical forests store large amounts of carbon (C) in aboveground tree biomass, the mechanistic controls on forest C stocks remain poorly resolved at the landscape-scale. Here, we aim at unraveling the mechanistic links between environmental controls such as edaphic factors (i.e. geology, soil type, topographic position) and climatic drivers (i.e. temperature, precipitation), and demographic parameters (species composition and vegetation structure).

Our results indicate that by accounting for species diversity and vegetation structure, both associated to environmental gradients and thus shaped by geographic region and forest type, current uncertainty in estimates of tropical aboveground C stocks across the landscape-scale could be greatly reduced. We conclude that resolving spatial patterns of tree species composition and vegetation structure associated with landscape-scale gradients of environmental controls will be crucial to create a mechanistic understanding of how these factors shape the distribution of aboveground C stocks and will be key to more accurately predict the C sequestration potential of tropical forests under scenarios of projected environmental changes.

Link: https://www.atbc2017.org

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Amazonas-Regenwald: Welche Blüten der Klimawandel treibt

Download von http://www.picturedesk.com am 30.05.2017 (15:32).
View from the ATTO tower at the ATTO research center in the rain forest in Manaus, Brazil, 7 November 2016. PHOTO: GEORG ISMAR/dpa – 20161107_PD13343

Der Klimawandel macht auch vor dem Amazonas-Regenwald nicht halt. Ein internationales Forscherteam ergründet nun, wie seine Bäume darauf reagieren Manaus/Wien – (derstandard.at›WissenschaftForschung Spezial, Text von Bernadette Strohmaier, 12.6.2017)



TLS comparing vegetation structure along topographic gradients

Recently we have been investigating species composition and vegetation structure in 20 one-hectare plots established along edaphic and topographic gradients across the OSA peninsula, Costa Rica comparing plot-based field measurements with data derived from terrestrial laser scanning (TLS). Check out some scans right here:

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LACOSA project update

In the currently running LACOSA project we will be investigating species composition and vegetation structure of >10.000 tree individuals that have been mapped and identified in 20 one-hectare plots established in SW Costa Rica. By using TLS to map aboveground C stocks across topoedaphic and successional gradients on the OSA peninsula we aim to create a more mechanistic understanding of how the controlling state factors (e.g. climate, geology, time and biota) determine the distribution of aboveground C stocks at the landscape-scale. Check out some of the scans right here: