Details

Autor(en) / Beteiligte

• Yin, Peiyi
• Li, Xuecao
• Pellikka, Petri

Titel

Asymmetrical Impact of Daytime and Nighttime Warming on the Interannual Variation of Urban Spring Vegetation Phenology

Ist Teil von

• Earth's future, 2024-05, Vol.12 (5), p.n/a

Ort / Verlag

Bognor Regis: John Wiley & Sons, Inc

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Urban warming significantly advances spring vegetation phenology. However, the potential effect of daytime and nighttime warming on the start of the urban vegetation growing season (SOS) remains to be determined. Here, we characterized the interannual response of SOS to daytime and nighttime warming from 2003 to 2020 using remotely sensed phenological observations across cities in the Northern Hemisphere (>30°N). We implemented the partial correlation analysis and the process‐based phenology model to quantify the effects of daytime and nighttime warming on vegetation. We found that either daytime or nighttime warming can promote an earlier urban spring SOS for Northern Hemisphere cities, while the phenological response varies across cities. Additionally, the response of SOS to daytime and nighttime urban warming (ST, expressed in advance days of SOS per °C warming) offset each other at an average rate of 0.08 days/°C per decade. Our results suggest that daytime warming predominates the temporal variation of SOS for high‐latitude cities, whereas nighttime warming is the primary driver of SOS change in low‐latitude cities. By revealing the effect and contributions of daytime and nighttime warming on the urban SOS, our results highlight the importance of considering daytime and nighttime temperatures separately in the response of vegetation phenology to urban thermal warming and climate variability. Plain Language Summary Understanding the shifts of spring vegetation phenology in urban areas can provide insights into assessing how urban ecosystems respond to climate change and identifying strategies to adapt and mitigate its effects. We studied the phenological response of vegetation from cities in the Northern Hemisphere over 17 years. We found that daytime and nighttime warming can cause spring vegetation phenology to start earlier in urban areas, while the phenological response to temperature varies between cities. The phenological response to temperature sensitivity of daytime and nighttime warming offset each other from 2003 to 2020. We also observed that daytime warming has a more significant impact on when vegetation starts growing in cities located in high latitudes. In contrast, in cities located in low latitudes, nighttime warming is the main factor driving the changes at the start of the growing season. The findings emphasize the need to consider daytime and nighttime temperatures rather than daily mean temperatures to study the impact of urban warming on vegetation growth and response to climate changes. Key Points Daytime and nighttime warming causing spring vegetation phenology to start earlier varies across cities in the Northern Hemisphere Temperature sensitivity of urban spring vegetation phenology to daytime and nighttime warming cancel each other from 2003 to 2020 Daytime and night warming dominate the changes in spring vegetation phenology of high‐latitudinal and low‐latitudinal cities, respectively