Read the passage below:
Before glaciologist Dr. Lars Lindqvist deployed the deep-ice thermal probe at the Maud Rise station in 2014, his team completed two seasons of radar mapping to identify stable subglacial channels. That mapping effort had been delayed for a year when severe blizzards forced an emergency evacuation of their base camp in 2011. Lindqvist's initial field surveys, conducted in 2009, had established the baseline ice-thickness measurements that justified the original grant proposal. Following the successful probe deployment, the team published their preliminary melt-rate analysis in 2016, confirming their subglacial water flow models.
Based on the passage, what is the correct chronological sequence of events in Dr. Lindqvist's research program, from earliest to latest?
- 1Dr. Lindqvist conducted initial field surveys to establish baseline ice-thickness measurements.
- 2Severe blizzards forced an emergency evacuation of the team's base camp.
- 3The research team deployed the deep-ice thermal probe at the Maud Rise station.
- 4The team published their preliminary melt-rate analysis.