Question: By how many days per decade has the melt season lengthened in the shallowest of the world's major oceans?

Context paragraphs:
Tunnel field-effect transistor: The tunnel field-effect transistor (TFET) is an experimental type of transistor.  Even though its structure is very similar to a metal-oxide-semiconductor field-effect (MOSFET), the fundamental switching mechanism differs, making this device a promising candidate for low power electronics.  TFETs switch by modulating quantum tunneling through a barrier instead of modulating thermionic emission over a barrier as in traditional MOSFETs.  Because of this, TFETs are not limited by the thermal Maxwell–Boltzmann tail of carriers, which limits MOSFET drain current subthreshold swing to about 60 mV/decade of current at room temperature (exactly 63 mV/decade at 300 K).  Joerg Appenzeller and his colleagues at IBM were the first to demonstrate that current swings below the MOSFET’s 60-mV-per-decade limit were possible.  In 2004, they reported they had created a tunnel transistor with a carbon nanotube channel and a subthreshold swing of just 40 mV per decade.

GI Jive: GI Jive was a 15-minute radio program transmitted by the Armed Forces Radio Service for entertainment of soldiers in World War II.  Its initial frequency of five days per week later increased to six days per week.  It was included in the group of "programs proposed for production on the AFRS's initial schedule".  "GI Jive" differed from AFRS programs like "Command Performance" and "Mail Call" in that it used a disc jockey format, with someone playing popular recordings of the day.  In contrast, "Command Performance" and "Mail Call" transcribed live performances by popular entertainers.

School for Deaf and Mute (Dushanbe): The school has 13 classrooms, a library, the director's office, offices for the director's assistants, and a computer lab.  There are 15 teachers and a student body of 135.  The school's currect director is Rafik S. H. Odinev.  Lessons are four days per week for grades 1 through 9 and 2 days per week for grades 10-12.

Anti-sidereal time: Anti-sidereal time and extended-sidereal time are artificial time standards used to analyze the daily variation in the number of cosmic rays received on Earth.  Anti-sidereal time has about 364.25 days per year, one day less than the number of days in a year of solar time, 365.25.  Thus each anti-sidereal day is longer than a solar day (24 hr) by about four minutes or 24 hr 4 min.  Extended-sidereal time has about 367.25 days per year, one day more than the number of days in a year of sidereal time, 366.25.  Thus each extended-sidereal day is shorter than a sidereal day (23 hr 56 min) by about four minutes or 23 hr 52 min.  All years mentioned have the same length.

Arctic sea ice decline: Arctic sea ice decline is the sea ice loss observed in recent decades in the Arctic Ocean.  The Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report states that greenhouse gas forcing is largely, but not wholly, responsible for the decline in Arctic sea ice extent.  A study from 2011 suggested that internal variability enhanced the greenhouse gas forced sea ice decline over the last decades.  A study from 2007 found the decline to be "faster than forecasted" by model simulations.  The IPCC Fifth Assessment Report concluded with high confidence that sea ice continues to decrease in extent, and that there is robust evidence for the downward trend in Arctic summer sea ice extent since 1979.  It has been established that the region is at its warmest for at least 40,000 years and the Arctic-wide melt season has lengthened at a rate of 5 days per decade (from 1979 to 2013), dominated by a later autumn freezeup.  Sea ice changes have been identified as a mechanism for polar amplification.

Global terrestrial stilling: Global terrestrial stilling is the decrease of wind speed observed near the Earth´s surface (~10-meter height) over the last three decades (mainly since the 1980s), originally termed “stilling”.  This slowdown of near-surface terrestrial winds has mainly affected mid-latitude regions of both hemispheres, with a global average reduction of -0.140 m s-1 dec-1 (meters per second per decade) or between 5 and 15% over the past 50-years.  .  With high-latitude (> 75° from the equator) showing increases in both hemispheres.  In contrast to the observed weakening of winds over continental surfaces, winds have tended to strengthen over ocean regions .  In the last few years, a break in this terrestrial decrease of wind speed has been detected suggesting a recovery at global scales since 2013.

Star Theatre, Kolkata: The Star Theatre is a theatre in Kolkata, built in 1883.  Initially situated in Beadon Street, the theatre later moved to Cornwallis Street - now called Bidhan Sarani.  The Star, along with the Minerva Theatre, was one of the first institutions of commercial Bengali theatre.  The Star, along with Minerva and The Classic Theatre, were also one of the places where the first motion pictures in Bengal, made by Hira Lala Sen, were screened.  This is a heritage site of Calcutta (Kolkata) that was destroyed in a fire and thereafter restored by the local municipal corporation.  The restored Star Theatre maintains the heritage facade; the interiors are contemporary.  The property is maintained by a private company.  At present, it is primarily a cinema hall; plays are staged on about two days per month.  However, during winter (December and January) plays are staged here much more frequently, of the order of ten days per month.  The auditorium has excellent acoustics.  Star Theatre is close to the junction of Grey Street (Aurobindo Saranee) and Cornwallis Street (Bidhan Saranee); the area near this junction is called Hatibagan (Elephant Park).  The theatre is a 10-minute walk from the Shobhabazar-Sutanuti station of the underground railway.  Star Theatre has an underground car park with a nominal parking fee of Rs 10/- per hour (minimum three hours).  Tramcar tracks, and services, on Grey Street and Cornwallis Street enhance the heritage ambience.

Arctic Ocean: The Arctic Ocean is the smallest and shallowest of the world's five major oceans.  The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea or simply the Arctic Sea, classifying it a mediterranean sea or an estuary of the Atlantic Ocean.  Alternatively, the Arctic Ocean can be seen as the northernmost part of the all-encompassing World Ocean.

Natori River: The Natori River is a river in the northeastern part of Japan.  The river's headwaters start in the Zao Mountain range, it flows through the Sendai Plain and ends by draining into Sendai Bay.  The river's estuary is located on Japan's east coast, and faces the Pacific Ocean.  The river's flow is the greatest during the snow melt season from MarchApril, the rainy season from June July and during the typhoon season from September October.  The river's length is 55 km, and its tributaries are the Hirose, Masuda and Goishi Rivers.  The Natori provides water for 1 million people in Sendai.

Roll-off: Roll-off is the steepness of a transmission function with frequency, particularly in electrical network analysis, and most especially in connection with filter circuits in the transition between a passband and a stopband.  It is most typically applied to the insertion loss of the network, but can, in principle, be applied to any relevant function of frequency, and any technology, not just electronics.  It is usual to measure roll-off as a function of logarithmic frequency, consequently, the units of roll-off are either decibels per decade (dB/decade), where a decade is a 10-times increase in frequency, or decibels per octave (dB/8ve), where an octave is 2-times increase in frequency.

Supporting paragraphs: Arctic sea ice decline Arctic Ocean
Answer: 5 days per decade