text: **Abstract:**Distinct perceptions of the global climate is one of the factors preventing society from 
  achieving consensus or taking collaborative actions on this issue. The public has not even reached 
  an agreement on the naming of the global concern, showing preference for either “climate change” 
  or “global warming”, and few previous studies have addressed these two competing discourses 
  resulting from distinct climate concerns by diﬀerently linking numerous climate concepts. Based on 
  the 6,662,478 tweets containing #climatechange or #globalwarming generated between 1 January 2009 
  and 31 December 2018, we constructed the semantic networks of the two discourses and examined 
  their evolution over the decade. The ﬁndings indicate that climate change demonstrated a more 
  scientiﬁc perspective and showed an attempt to condense climate discussions rather than diﬀuse the 
  topic by frequently addressing sub-topics simultaneously. Global warming triggered more political 
  responses and showed a greater connection with phenomena. Temporal analysis suggests that 
  traditional political discussions were gradually fading in both discourses but more recently started to 
  revive in the form of discourse alliance in the climate change discourse. The associations between 
  global warming and weather abnormalitiessuddenly strengthened around 2012. Climate change is 
  becoming more dominant than global warming in public discussions. Although two discourses have 
  shown more similarities in the rank order of important climate concepts, apparent disagreements 
  continue about how these concepts are associated. These ﬁndings lay the groundwork for researchers 
  and communicators to narrow the discrepancy between diverse climate perceptions. 