Video – Weather? or Climate Change?

New video by Peter Sinclair (link)

 

Temperature Trends – 12 Airports – East Coast USA

12_airport_trend

This animated gif  shows changes in annual mean temperature at 12 East Coast USA airports that had continuous daily data for the 1950 – 2015 period. The data was retrieved from Weather Underground using the R weatherData package .

11 of the 12 airports (all but JAX) show statistically significant increases in annual mean temperatures.

 

Philadelphia’s Changing Climate

2016  has been a hot and dry summer  in Philadelphia. Here are a few charts that summarize the 1950-2016 daily temperature and precipitation data at Philadelphia International Airport (PHL).

August 2016 warmest in 1950 – 2016 period

The mean temperature in August, 2016 was 81.3 F, making it the hottest August in the 1950 – 2016 period.KPHL_8_Monthly Mean Temerature

41 Days with maximum daily temperature was 90 or more degrees. 

KPHL_Summer_hot_days_2016-09-01

Very Dry Summer

It’s been a dry summer, we are 3.34 inches below median cumulative rainfall for this time of year. 2016 ranks 35th out of 45 years, only 11 years have had less rain than 2016 since 1970.KPHL_CumulativeRainfall_2016-09-01

 

 

Hot Summer in Philadelphia

It’s been a hot summer in Philadelphia so far this year. I started wondering in the global warming has anything to do with our recent spate of 90+ days.

First, lets look at the global warming situation. NASA has announced that July, 2016 is the warmest month on record (here, here). We are well on our way to the 3rd year of record breaking global temperatures.

NASA’s GISS Temperature Anomaly Trend

Is there a connection between global temperature increases and our 90+ summer? To find out, I first downloaded temperature data from the Weather Underground for Philadelphia’s NE Airport. I then plotted the daily maximum and minimum temperatures for the summer months of May through yesterday.

KPNE_Summer_hot_days

On first glance at the chart, I was sure that I found proof that our 33 90+ days was proof that global warming has hit Philadelphia. As I dug deeper I found that the number of 90+ days varies from a low of 6 in 1978,  to 41 in 2010 and a high of 43 in 1988. We are in the high end of the  6 – 43 day ranges of 90+ temperatures  range of the number of 90+ days we have had in the 1975 – 2015 period.

We need to dig deeper to find links between the number of Philadelphia’s dog days of summer and global warming. I’ll be writing on this more in the comming months.

 

Ken Burns 2016 Election Thoughts on Trump

Ken Burns gave the commencement address at Stanford’s 2016 graduation. Here is the portion of the talk where Burns talks about the 2016 election, specifically the lack of qualifications and dangers of Donald Trump.

 

Image

Looking at Texas Flood with LandSat

Houston, Texas area has seen major rainfall and flooding.  This gif animation shows LandSat images of the Brazos River on May 4, 2013 and May 28, 2016 after the recent Texas storms.  (NASA link)

Texas_flood_landsat

Brazos River: normal and May 28, 2016 flood

Lake Powell Full & Now

The Colorado Basin has been suffering a drought for 15 years. Here’s a look at how the drought has caused water levels in Lake Powell to drop to today’s low levels.