最后计算每日的climate change index,计算方法是CCV的tf-idf score与每日《华尔街日报》tf-idf之间的cosine similarity。文章没具体说明怎么算的,但我猜想是这样的,两类语料库(所有日报+CCV)的所有单词构成了一个超长vector,如果一篇document(日报 or CCV)包含某词汇,则相应位置为该词的tf-idf值,否则为0,这样可以...
A log-rank test of the null that the distributions in the two countries are identical however rejects the null at the 1% significance level (log-rank statistic 65.97, for a p value of less than 0.001). This finding essentially confirms that, when we do not control for covariates, the WTP...
Assessment of Climate Change for the Baltic Sea Basin Benjamin Smith, Anto Aasa, Rein Ahas, Thorsten Blenckner, Terry V. Callaghan, Jacqueline de Chazal, Christoph Humborg, Anna Maria Jönsson, Seppo Kellomäki, Ain Kull, Esa Lehikoinen, Ülo Mander, Peeter Nõges, ...
The impact of climate change on freshwater life stages was not always negative but rather depended on population‑specific and model‑specific sensitivity. In the headwaters, the fall flow model produced a net benefit to parr‑to‑smolt survival, whereas the summer flow model lowered survival...
change in the forest state (Fig.3b). The tolerance to AD was quantified as the difference between the local TACADand the TAC value averaged over the 2000–2009 period to characterize the pre-disturbance conditions. The tolerance metric was explored across a gradient of aridity index59(Fig.3c...
-1.21% Change Percent 0.08% Expense Ratio NASDAQ: USCL | 3:59:59 PM | 3/4/2025 SEE FULL INTERACTIVE CHART About iShares Climate Conscious &TrnMSCIUSAETF The investment seeks to track the investment results of the MSCI USA Extended Climate Action Index composed of U.S. large- and mid-ca...
In Italy the climate risk index improved model ensemble data and applied a more robust analysis to rank administrative areas in relation to different climate change impacts, in order to support the allocation of funds for adaptation. In CCRA methodological advances such as the business-function ...
Aim Ecological niche modelling is one of the main tools that allows for the incorporation of climate change effects into conservation planning. For example, ecological niche model predictions can be used to rank species by degree of predicted future habitat loss. While many studies have considered ...
Projected trends in climate and drought index Projection of climate in Nigeria revealed significant changes in both rainfall and temperature for different RCPs. Annual rainfall was projected to change in the range of −7.5% to 27%. All the RCPs showed both increase and decrease. The temperature...
Climate change could drive some critical parts of the Earth system towards tipping points—triggering a ‘tipping event’ of abrupt and/or irreversible change into a qualitatively different state, self-propelled by strong amplifying feedback1,2. Crossing tipping points—triggering ‘regime shifts’3or...