The start of the growing season (SOS) is essential to track the responses of vegetation to climate change. However, recent findings on whether the SOS in the middle-high latitudes of the Northern Hemisphere (NH) continued to advance or reversed during the global warming hiatus were not consistent. It is necessary to investigate the causes of this controversy and to examine the relationship between the SOS and preseason temperature trends. To this end, we first applied four widely used phenology extraction methods to derive the SOS from the GIMMS NDVI3g dataset and then used the ensemble empirical modal decomposition (EEMD) method to extract the nonlinear trends of the SOS and preseason temperature. Our results clarify, for the first time, that the limitations of the linear assumption-based trend analysis methods are an important but overlooked cause of the discrepancies among existing studies on whether the SOS was advanced or delayed in the NH (>30° N) during the global warming hiatus. We further revealed the range of the mismatches between the SOS and preseason temperature trends at the latitude, altitude and biome levels. Specifically, we discovered that the SOS in the NH (>30° N) obtained by the four phenology extraction methods showed a significant reversal from advance to delay during the global warming hiatus, and the corresponding average rate of change was very small. The area showing increasing preseason temperatures decreased during the global warming hiatus, but it always occupied most of the NH (>30° N). However, delayed SOS trends were dominant in the NH from 50° N to 60° N, above 3000 m and in biomes other than TBMF and BF. Accordingly, using an EEMD-like approach to evaluate the changes in the SOS and preseason temperature is necessary for improving our understanding of the changes in the SOS and their association with climate.

Download full-text PDF

Source
http://dx.doi.org/10.1111/gcb.16580DOI Listing

Publication Analysis

Top Keywords

global warming
20
warming hiatus
20
sos preseason
16
preseason temperature
16
sos
11
middle-high latitudes
8
latitudes northern
8
northern hemisphere
8
temperature trends
8
phenology extraction
8

Similar Publications

Plastic pollution and marine mussels: Unravelling disparities in research efforts, biological effects and influences of global warming.

Sci Total Environ

December 2024

Université de Lille, CNRS, Université du Littoral Côte d'Opale, IRD, UMR 8187, LOG, Laboratoire d'Océanologie et de Géosciences, Station marine de Wimereux, F-59000 Lille, France; Department of Marine Resources and Energy, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan; Department of Zoology and Entomology, Rhodes University, Grahamstown 6140, South Africa.

The ever-growing contamination of the environment by plastics is a major scientific and societal concern. Specifically, the study of microplastics (1 μm to 5 mm), nanoplastics (< 1 μm), and their leachates is a critical research area as they have the potential to cause detrimental effects, especially when they impact key ecological species. Marine mussels, as ecosystem engineers and filter feeders, are particularly vulnerable to this type of pollution.

View Article and Find Full Text PDF

Background: The healthcare sector emits 5% of greenhouse gases worldwide, inhaled anesthetic agents have contributed to this effect for years. Other countries measured and limited their use, leading to positive environmental changes. There is a lack of data on Colombia.

View Article and Find Full Text PDF

Marine Heatwaves (MHWs) are prolonged episodes of above- 'normal' Sea Surface Temperature (SST) which have imposed detrimental impacts on oceans and their dependent ecosystem services. The key question still remained unresolved or at least still not fully addressed in MHW science, is 'What is a valid normal or baseline?'. In other words, can the conventional 'normal' serve as a realistic valid baseline in today's oceans experiencing the impacts of contemporaneous climatic changes and global warming during anthropogenic era? To robustly address this issue, we attempted to propose a methodology for identifying MHW thresholds that accounts for SST warming.

View Article and Find Full Text PDF

Greenhouse gas (GHG) emissions from livestock ruminants, particularly methane (CH), nitrous oxide, and indirectly ammonia (NH) significantly contribute to climate change and global warming. Conventional monoculture swards for cattle feeding, such as perennial ryegrass or Italian ryegrass, usually require substantial fertiliser inputs. Such management elevates soil mineral nitrogen levels, resulting in GHG emissions and potential water contamination.

View Article and Find Full Text PDF

Recent advances in the study of mercury biogeochemistry in Arctic permafrost ecosystems.

Sci Total Environ

December 2024

Centro de Química Estrutural, Institute of Molecular Sciences and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal; Centre d´études nordiques (CEN), Université Laval, Québec, QC G1V 0A6, Canada. Electronic address:

Permafrost predominates in polar and high mountain regions, encompassing nearly 15 % of the exposed land in the Northern Hemisphere. It denotes soil or rock that remains at or below 0 °C for the duration of at least two consecutive years. These frozen soils serve as a barrier to contaminants that are stored and accumulated in permafrost over extended periods of time.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!