Predictions of river temperature and sensitivity to climate change in Scotland

These layers are the outputs of research which developed a national river temperature model for Scotland capable of predicting both daily maximum river temperature and sensitivity to climate change. The layers show the following:

summer_max_tw_2015_16 – Predictions of maximum daily river temperatures for the hottest day between July 2015 and June 2016.

summer_max_tw_2003 – Predictions of maximum daily river temperatures for the hottest year in the last 20 years (2003).

summer_climate_change_sensitivity – Predictions of the change in river temperature that would result from a 1°C increase in air temperature.

A fourth layer has been developed to combine the outputs from “summer_max_tw_2003” and “summer_climate_change_sensitivity” into a single layer that can be used to prioritise management where the relative importance of maximum temperature and temperature change are considered to be equal. This was achieved by (1) dividing the predictions of ‘summer_max_tw_2003’ and ‘summer_climate_change_sensitivity’ into 5 equal categories between the minimum and maximum observed values (2) assigning these categories a value ranging from 1 (the hottest / most sensitive rivers) to 5 (the coolest / least sensitive rivers) (3) sum the rankings (-1) to produce an overall priority ranking (1:9) where rivers ranked as 1 are the highest priority for management (i.e. high river temperature and high climate sensitivity) and 9 the lowest.

Management_Priority_Layer – Management priority on a scale of 1:9 where 1 is the highest priority (i.e. high river temperature and high climate sensitivity) and 9 the lowest.

* Please Note * This layer was derived by the Scottish Government from a licensed dataset. It is not downloadable or routinely available.

The data can be shared on request if a user provides evidence that they hold a licence from the UK Centre for Ecology and Hydrology (UKCEH) for the 1:50,000 Digital River Network (https://www.ceh.ac.uk/data/15000-watercourse-network)

本数据集为苏格兰国家河流温度模型研究成果的输出，该模型能够预测每日河流最高温度及其对气候变化的敏感性。数据层包括以下内容：

summer_max_tw_2015_16 – 预测2015年7月至2016年6月间最热一天的最高每日河流温度。

summer_max_tw_2003 – 预测过去20年中（2003年）最热年份的最高每日河流温度。

summer_climate_change_sensitivity – 预测气温上升1°C导致的河流温度变化。

此外，还开发了一个第四层数据，将“summer_max_tw_2003”和“summer_climate_change_sensitivity”的输出合并为单一数据层，以便在考虑最大温度和温度变化相对重要性相等的情况下进行管理优先级排序。此合并过程通过以下步骤实现：（1）将‘summer_max_tw_2003’和‘summer_climate_change_sensitivity’的预测结果划分为从最低到最高观测值之间的5个等分类别；（2）将这些类别赋予从1（最热/最敏感的河流）到5（最冷/最不敏感的河流）的数值；（3）对排名求和（-1）以产生总体优先级排名（1:9），其中排名第1的河流管理优先级最高（即河流温度高且气候敏感性高），而第9的优先级最低。

Management_Priority_Layer – 以1:9的比例表示的管理优先级，其中1为最高优先级（即河流温度高且气候敏感性高），9为最低优先级。

*请注意* 此数据层由苏格兰政府从授权数据集中提取，不可下载或常规获取。

如用户能够提供持有英国生态与水文中心（UKCEH）1:50,000数字河流网络（https://www.ceh.ac.uk/data/15000-watercourse-network）许可证的证据，则可根据请求共享数据。