Daan Blok
Dados Biográficos
| ID | 6020651 |
|---|---|
| NOME | Daan Blok |
| PRENOMES | Daan |
| SOBRENOME | Blok |
| ASSINATURA | BLOK D |
| AFILIAÇÕES | University of Copenhagen |
| ORCID | 0000-0003-2703-9303 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 5 |
| TOTAL DE CITAÇÕES | 2 |
| TOTAL COMO AUTOR | 5 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 2011 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2020 |
| ÍNDICE H | 1 |
Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems
Soils are warming as air temperatures rise across the Arctic and Boreal region concurrent with the expansion of tall-statured shrubs and trees in the tundra. Changes in vegetation structure and function are expected to alter soil thermal regimes, thereby modifying climate feedbacks related to permafrost thaw and carbon cycling. However, current understanding of vegetation impacts on soil temperature is limited to local or regional scales and lack…
Deepened winter snow increases stem growth and alters stem δ 13 C and δ 15 N in evergreen dwarf shrub Cassiope tetragona in high-arctic Svalbard tundra
nDeeper winter snow is hypothesized to favor shrub growth and may partly explain the shrub expansion\nobserved in many parts of the arctic during the last decades, potentially triggering biophysical\nfeedbacks including regional warming and permafrost thawing.Weexperimentally tested the effects\nof winter snow depth on shrub growth and ecophysiology by measuring stem length and stem\nhydrogen (δ2H), carbon (δ13C), nitrogen (δ15N) and oxygen (δ18O…
Tundra in the Rain
The response of Arctic vegetation to the summer climate
Recently observed Arctic greening trends from normalized difference vegetation index (NDVI) data suggest that shrub growth is increasing in response to increasing summer temperature. An increase in shrub cover is expected to decrease summer albedo and thus positively feed back to climate warming. However, it is unknown how albedo and NDVI are affected by shrub cover and inter-annual variations in the summer climate. Here, we examine the relations…
Shrub expansion in tundra ecosystems
Recent research using repeat photography, long-term ecological monitoring and dendrochronology has documented shrub expansion in arctic, high-latitude and alpine tundra ecosystems. Here, we (1) synthesize these findings, (2) present a conceptual framework that identifies mechanisms and constraints on shrub increase, (3) explore causes, feedbacks and implications of the increased shrub cover in tundra ecosystems, and (4) address potential lines of…
The response of Arctic vegetation to the summer climate
Recently observed Arctic greening trends from normalized difference vegetation index (NDVI) data suggest that shrub growth is increasing in response to increasing summer temperature. An increase in shrub cover is expected to decrease summer albedo and thus positively feed back to climate warming. However, it is unknown how albedo and NDVI are affected by shrub cover and inter-annual variations in the summer climate. Here, we examine the relations…
Shrub expansion in tundra ecosystems
Recent research using repeat photography, long-term ecological monitoring and dendrochronology has documented shrub expansion in arctic, high-latitude and alpine tundra ecosystems. Here, we (1) synthesize these findings, (2) present a conceptual framework that identifies mechanisms and constraints on shrub increase, (3) explore causes, feedbacks and implications of the increased shrub cover in tundra ecosystems, and (4) address potential lines of…
Tundra in the Rain
Deepened winter snow increases stem growth and alters stem δ 13 C and δ 15 N in evergreen dwarf shrub Cassiope tetragona in high-arctic Svalbard tundra
nDeeper winter snow is hypothesized to favor shrub growth and may partly explain the shrub expansion\nobserved in many parts of the arctic during the last decades, potentially triggering biophysical\nfeedbacks including regional warming and permafrost thawing.Weexperimentally tested the effects\nof winter snow depth on shrub growth and ecophysiology by measuring stem length and stem\nhydrogen (δ2H), carbon (δ13C), nitrogen (δ15N) and oxygen (δ18O…
Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems
Soils are warming as air temperatures rise across the Arctic and Boreal region concurrent with the expansion of tall-statured shrubs and trees in the tundra. Changes in vegetation structure and function are expected to alter soil thermal regimes, thereby modifying climate feedbacks related to permafrost thaw and carbon cycling. However, current understanding of vegetation impacts on soil temperature is limited to local or regional scales and lack…
Climate change and permafrost (5 obras) · Cryospheric studies and observations (5 obras) · Ecology (5 obras) · Environmental Science (5 obras) · Geography (5 obras) · Physical geography (5 obras) · Tundra (5 obras) · Arctic (4 obras) · Biology (4 obras) · Shrub (4 obras)