Zobrazeno 1 - 10
of 375
pro vyhledávání: '"J. Aalto"'
Projected changes in forest fire season, the number of fires, and burnt area in Fennoscandia by 2100
Publikováno v:
Biogeosciences, Vol 21, Pp 4739-4763 (2024)
Forest fire dynamics are expected to alter due to climate change. Despite the projected increase in precipitation, rising temperatures will amplify forest fire risk from the present to the end of the century. Here, we analysed changes in fire season,
Externí odkaz:
https://doaj.org/article/f3b84911520b4df4bfb30b3582dbb6bb
Publikováno v:
The Cryosphere, Vol 18, Pp 403-423 (2024)
Winter near-surface air temperatures have important implications for ecosystem functioning such as vegetation dynamics and carbon cycling. In cold environments, the persistence of seasonal snow cover can exert a strong control on the near-surface tem
Externí odkaz:
https://doaj.org/article/7c115ed3236545e4af11b088f21f130e
Publikováno v:
The Cryosphere, Vol 17, Pp 3157-3176 (2023)
Anthropogenic climate change threatens northern permafrost environments. This compromises the existence of permafrost landforms, such as palsas and peat plateaus, which have been assessed to be critically endangered habitats. In this study, we integr
Externí odkaz:
https://doaj.org/article/fe5bbd6b02b14ec792fe9513b76d5507
Autor:
M. Kämäräinen, J.-P. Tuovinen, M. Kulmala, I. Mammarella, J. Aalto, H. Vekuri, A. Lohila, A. Lintunen
Publikováno v:
Biogeosciences, Vol 20, Pp 897-909 (2023)
Accurate estimates of net ecosystem CO2 exchange (NEE) would improve the understanding of natural carbon sources and sinks and their role in the regulation of global atmospheric carbon. In this work, we use and compare the random forest (RF) and the
Externí odkaz:
https://doaj.org/article/2352beb6859f4fe3afbff11bd208d64f
Autor:
M. Suppula, M.H. Hällfors, K. Aapala, J. Aalto, E. Kemppainen, N. Leikola, P. Pirinen, R.K. Heikkinen
Publikováno v:
Global Ecology and Conservation, Vol 45, Iss , Pp e02526- (2023)
Land-use change is a perennial driver of biodiversity decline. However, climate change may pose novel pressures on species populations, adding to the mixture of anthropogenic threats. Determining the main causes for species decline is important for e
Externí odkaz:
https://doaj.org/article/b0f50815c6fe4f07848b4d19bd2002e2
Autor:
Y. Ran, X. Li, G. Cheng, J. Che, J. Aalto, O. Karjalainen, J. Hjort, M. Luoto, H. Jin, J. Obu, M. Hori, Q. Yu, X. Chang
Publikováno v:
Earth System Science Data, Vol 14, Pp 865-884 (2022)
Monitoring the thermal state of permafrost (TSP) is important in many environmental science and engineering applications. However, such data are generally unavailable, mainly due to the lack of ground observations and the uncertainty of traditional p
Externí odkaz:
https://doaj.org/article/6b9f0320080b49428df5be3f2f97d327
Autor:
J. L. McCarty, J. Aalto, V.-V. Paunu, S. R. Arnold, S. Eckhardt, Z. Klimont, J. J. Fain, N. Evangeliou, A. Venäläinen, N. M. Tchebakova, E. I. Parfenova, K. Kupiainen, A. J. Soja, L. Huang, S. Wilson
Publikováno v:
Biogeosciences, Vol 18, Pp 5053-5083 (2021)
In recent years, the pan-Arctic region has experienced increasingly extreme fire seasons. Fires in the northern high latitudes are driven by current and future climate change, lightning, fuel conditions, and human activity. In this context, conceptua
Externí odkaz:
https://doaj.org/article/f3efdbcffd75460998f63723ebe5c8ec
Autor:
J. Ruiz-Jimenez, M. Okuljar, O.-M. Sietiö, G. Demaria, T. Liangsupree, E. Zagatti, J. Aalto, K. Hartonen, J. Heinonsalo, J. Bäck, T. Petäjä, M.-L. Riekkola
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 8775-8790 (2021)
Primary biological aerosol particles (PBAPs) play an important role in the interaction between biosphere, atmosphere, and climate, affecting cloud and precipitation formation processes. The presence of pollen, plant fragments, spores, bacteria, algae
Externí odkaz:
https://doaj.org/article/36a207bc037044a6b5524cd515e0531d
Autor:
L. Heikkinen, M. Äijälä, M. Riva, K. Luoma, K. Dällenbach, J. Aalto, P. Aalto, D. Aliaga, M. Aurela, H. Keskinen, U. Makkonen, P. Rantala, M. Kulmala, T. Petäjä, D. Worsnop, M. Ehn
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 3151-3180 (2020)
The Station for Measuring Ecosystem–Atmosphere Relations (SMEAR) II is well known among atmospheric scientists due to the immense amount of observational data it provides of the Earth–atmosphere interface. Moreover, SMEAR II plays an important ro
Externí odkaz:
https://doaj.org/article/cdcc070c7aa743f583d2c6022e03c35d
Publikováno v:
The Cryosphere, Vol 13, Pp 693-707 (2019)
The thermal state of permafrost affects Earth surface systems and human activity in the Arctic and has implications for global climate. Improved understanding of the local-scale variability in the global ground thermal regime is required to account f
Externí odkaz:
https://doaj.org/article/d322fc01827943ebbb4b14e33095966d