3. Evidence for climate change

‘Evidence for climate change’ presents the scientific evidence that anthropogenic climate change is already happening and considers changes in global temperature, precipitation, sea level, and extreme weather events (heatwaves, droughts, floods, storms, and wildfires). The latest IPCC report states that it is virtually certain that anthropogenic climate change has caused increases in the frequency and severity of hot extremes and decreases in cold extremes on most continents. Climate change is also the main cause of the intensification of heavy precipitation observed over continental regions, often resulting in flooding. Moreover, human climate change has played a role in shaping the global distribution and intensity of tropical cyclones/typhoons and hurricanes. What do the climate change deniers say and why they are wrong?

Reconstructing the Climate Variability During the Last 5000 Years From the Banni Plains, Kachchh, Western India

The climatic conditions during the beginning of the last 5,000 years have been discussed, debated, and documented from various parts of the Indian subcontinent, due to the human–climate interrelationship. In the present study, we report a multi-proxy dataset encompassing the widely used ∼ geochemical and mineral magnetic proxies supported by radiocarbon and optical chronologies from the Banni Plains of the Rann of Kachchh, western India. Our results support the earlier observations of the prolonged wetter climatic condition synchronous with the mature phase of Harappan era which witnessed a short and intense arid condition at the terminal part of the mature Harappan phase. The climate system dramatically fluctuated during the last five millennia from pulsating between relatively arid (4,800–4,400 years BP, 3,300–3,000 years BP, and at 2,400 years BP) and relatively humid phases (>4,800 years BP, 4,000–3,300 years BP, 1900–1,400 years BP, and 900–550 years BP). The multi-proxy dataset shows a gradual strengthening of the monsoonal conditions from the Banni Plains during the late Harappan phase. Apart from this, the high sedimentation rate (>1 mm/yr) recorded from the Banni Plains suggests it can be tapped as a robust archive to reconstruct multi-decadal to centennial climatic events spanning the Holocene epoch.

Exploring the usability of the andragogical process model for learning for designing, delivering and evaluating a workplace communication partner training

Purpose This study aims to explore the usability of the andragogical process model for learning to develop, deliver and evaluate training to improve communication between adapted transport drivers and people living with communication disabilities and to identify the successes and limitations of the model in this context. Design/methodology/approach Two aspects were considered to explore the usability of the andragogical process model for learning: a comparison between the elements of the model and the designing, delivering and evaluating processes of the training; and an appreciation evaluation. Findings The model was useful to systematically design, deliver and evaluate workplace training that was appreciated by the learners, even though most of the model’s elements were modified to meet the constraints of the trainer and the organization. Assessing the needs for learning, establishing a human climate conducive to learning and choosing appropriate training methods emerged as key elements that contributed to a successful appreciation of this training. Originality/value This study is one of the few that examines the possibility of a systematic application of the andragogical process model for learning to workplace training. Its results suggest that the model could be considered for application by non-professional trainers or external trainers from a workplace, but that organizational constraints must be considered when using it.

Late-Holocene vegetation change reveals the environment of ancient people and the origin of Huashan cliff paintings in Guangxi, southwestern China

Human activities in the historical period were determined by the natural environment and social characteristics. The Zuojiang Huashan Rock Art Cultural Landscape in Guangxi is the most important World Heritage for prehistorical culture in southwestern China. However, knowledge about the natural environment and associated historic human–climate interactions during the period of cliff painting creation remains scarce, which has been an obstacle to understanding the process of regional civilization. Here, we report a pollen record from the core distributing region of Huashan cliff paintings to interpret the natural environment and climate changes, and further to discuss how and why ancient people create these giant cliff paintings based on the relationships of human–climate interactions. Pollen results imply an existence of a mixed broad-leaf and conifer forest in the woodland landscape at Huashan region before 1860 cal. yr BP, after which pine forests were more prevalent. During the cliff painting period from 2370 to 2115 cal. yr BP, broad-leaf and conifer trees dominated the tree layer and provided the key source materials for painting. It can be reasonably assumed that people used stake or ladder to climb the cliffs and created the cliff paintings during a humid climate condition from 2560 to 2000 cal. yr BP. Furthermore, the humid climate during 2700 and 2400 cal. yr BP had been interrupted by short-term drought episodes. These turbulent climate episodes probably played the role of disasters and impacted on the human activities, leading to the social–political tensions and the out-break of war. During the Qin and Han Dynasties, social–political changes relieved the pressure from natural climate changes and led to a more stable society, in which the creating of cliff paintings was gradually fading. Our results manifest the necessity to analyze the natural environment and social–political background in combination in this study on ancient human activities.