Essays about: "ring width"

Showing result 1 - 5 of 24 essays containing the words ring width.

  1. 1. Effect of tree age on masting signal in tree-ring chronologies of beech in southern Sweden

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Jeppe Van Der Lee; [2023]
    Keywords : beech; masting; masting signal; proxy; tree-ring chronologies; age; dominance; social position; southern Sweden; climate change; tree growth; regeneration success;

    Abstract : Masting is a synchronous and highly variable production of seeds in tree species. Masting may reflect a reproduction strategy to cope with seed predation. In beech, temperature is the cue controlling annual variability in seeding. Masting behaviour in beech typically begins around the age of 40 years. READ MORE

  3. 2. POSSIBLE TIMING OF THE TRANSITION FROM PRE-INDUSTRIAL TO INDUSTRIAL CLIMATE IN THE CENTRAL TO NORTHERN OF SWEDEN, BASED ON PROXY DATA FROM TREE-RINGS

    University essay from Göteborgs universitet/Institutionen för geovetenskaper

    Author : Mika Falkensjö Oppenheim; [2022-09-28]
    Keywords : Tree-ring; maximum latewood density MXD ; Scandinavia; pre-industrial; industrial climate;

    Abstract : Earth’s climate has varied through time, with orbital forcing as the most dominant force on the climate system the last million years, causing glacial-interglacial cycles. The last glacial period ended about 11.6 thousand years (kyr), ago and the last interglacial maximum around 6.5 kyr ago. READ MORE

  4. 3. CLIMATE CHANGE AND THE NORWAY SPRUCE TREELINE IN THE CENTRAL SCANDINAVIAN MOUNTAINS Treeline evolution, tree growth and a Blue Intensity summer temperature reconstruction

    University essay from Göteborgs universitet/Institutionen för geovetenskaper

    Author : Fredrik Karlsson; [2022-09-01]
    Keywords : Treeline evolution; Tree growth; Norway spruce; central Scandinavian mountains; Blue Intensity;

    Abstract : In the context of global change, mountain regions have received increased interest in recent times with researchers trying to answer how such regions may be affected by a changing climate. Treeline environments are sensitive to the impacts of climate change which may significantly alter the characteristics of the regions. READ MORE

  5. 4. Minskande senvuxenhet på produktiv skogsmark i Norrland : implikationer för vedlevande organismer och betydelsen av myr- och bergimpediment

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Tyr Nilsson; [2022]
    Keywords : Slow-grown trees; growth rate; ring width; pinus sylvestris; picea abies; low-productive forests; mires; rocky outcrops; swedish NFI;

    Abstract : Senvuxen ved är ett viktigt substrat för vissa vedlevande organismer på grund av en långsam nedbrytning och låg konkurrens. Tillväxtförhöjande åtgärder inom skogsbruk, liksom ökande temperaturer, kan ha orsakat en minskning av senvuxen ved under den senare halvan av 1900-talet. READ MORE

  6. 5. Elemental variability in tree-rings as indicator for climate change : a case study on beech and oak trees at the Laacher See, Germany

    University essay from Stockholms universitet/Institutionen för naturgeografi

    Author : Ann-Kathrin Wild; [2022]
    Keywords : trace elements; tree-rings; dendrochemistry; dendroclimatology; ITRAX; Laacher See; mofettes; tree-bark; Quercus sp.; Fagus sp.;

    Abstract : The aim of this study was to contribute to the comprehension of the connection of element uptake in trees at the Laacher See in Germany and climatic parameters on different time scales. Understanding the relationship of certain elements in trees and temperature might enable the assignment of extraordinary high peaks in the elemental concentration, which cannot be explained by temperature, to another process as CO2 degassing of the mofettes, which are relics of the volcanic past of the lake. READ MORE